XML 23 R57.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Consolidated Balance Sheet by Industry Segment (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Apr. 01, 2013
--- | --- | --- | --- | ---
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 729,023 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | $ 495,112 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | $ 601,615 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | $ 463,744 us-gaap_CashAndCashEquivalentsAtCarryingValue |
Reinsurance recoverables and trade receivables, net | 197,640 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet |  | 199,322 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet |  |  |  |  |
Inventories, net | 69,817 us-gaap_InventoryNet |  | 67,020 us-gaap_InventoryNet |  |  |  |  |
Prepaid expenses | 94,076 us-gaap_OtherPrepaidExpenseCurrent |  | 55,269 us-gaap_OtherPrepaidExpenseCurrent |  |  |  |  |
Investments, fixed maturities and marketable equities | 1,294,568 us-gaap_MarketableSecurities |  | 1,138,275 us-gaap_MarketableSecurities |  |  |  |  |
Investments, other | 246,766 us-gaap_Investments |  | 248,850 us-gaap_Investments |  |  |  |  |
Deferred policy acquisition costs, net | 116,191 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired |  | 118,707 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired |  |  |  |  |
Other assets | 148,940 us-gaap_DepositsAssets |  | 97,588 us-gaap_DepositsAssets |  |  |  |  |
Related party assets | 148,776 us-gaap_DueFromRelatedParties |  | 169,624 us-gaap_DueFromRelatedParties |  |  |  |  |
Subtotal assets | 3,045,797 uhal_SubtotalAssets |  | 2,589,767 uhal_SubtotalAssets |  |  |  |  |
Investments in subsidiaries | 0 us-gaap_EquityMethodInvestments |  | 0 us-gaap_EquityMethodInvestments |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 457,229 us-gaap_Land |  | 405,177 us-gaap_Land |  |  |  |  |
Buildings and improvements | 1,641,420 us-gaap_BuildingsAndImprovementsGross |  | 1,430,330 us-gaap_BuildingsAndImprovementsGross |  |  |  |  |
Furniture and equipment | 344,016 us-gaap_FurnitureAndFixturesGross |  | 322,088 us-gaap_FurnitureAndFixturesGross |  |  |  |  |
Property, plant and equipment (gross) | 5,751,913 us-gaap_PropertyPlantAndEquipmentGross |  | 5,141,717 us-gaap_PropertyPlantAndEquipmentGross |  |  |  |  |
Less: Accumulated depreciation | (1,891,178)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |  | (1,732,506)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |  |  |  |  |
Total property, plant and equipment | 3,860,735 us-gaap_PropertyPlantAndEquipmentNet |  | 3,409,211 us-gaap_PropertyPlantAndEquipmentNet |  |  |  |  |
Total assets | 6,906,532 us-gaap_Assets |  | 5,998,978 us-gaap_Assets |  | 5,874,109 us-gaap_Assets |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 353,564 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent |  | 357,954 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent |  |  |  |  |
Notes, loans and leases payable | 2,364,513 us-gaap_DebtAndCapitalLeaseObligations |  | 1,942,359 us-gaap_DebtAndCapitalLeaseObligations |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 1,063,986 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense |  | 1,082,598 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense |  |  |  |  |
Liabilities from investment contracts | 673,051 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts |  | 616,725 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts |  |  |  |  |
Other policyholders' funds and liabilities | 10,469 us-gaap_PolicyholderFunds |  | 7,988 us-gaap_PolicyholderFunds |  |  |  |  |
Deferred income | 14,605 us-gaap_DeferredRevenue |  | 31,390 us-gaap_DeferredRevenue |  |  |  |  |
Deferred income taxes | 519,936 us-gaap_DeferredTaxLiabilities |  | 432,596 us-gaap_DeferredTaxLiabilities |  |  |  |  |
Related party liabilities | 0 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent |  | 0 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent |  |  |  |  |
Total liabilities | 5,000,124 us-gaap_Liabilities |  | 4,471,610 us-gaap_Liabilities |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 449,156 us-gaap_AdditionalPaidInCapital |  | 444,210 us-gaap_AdditionalPaidInCapital |  |  |  |  |
Accumulated other comprehensive loss | (27,357)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |  | (53,923)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |  |  |  |  |
Retained earnings | 2,152,714 us-gaap_RetainedEarningsAccumulatedDeficit |  | 1,805,453 us-gaap_RetainedEarningsAccumulatedDeficit |  |  |  |  |
Unearned employee stock ownership plan shares | (952)us-gaap_UnearnedESOPShares |  | (1,219)us-gaap_UnearnedESOPShares |  |  |  |  |
Total stockholders' equity | 1,906,408 us-gaap_StockholdersEquity |  | 1,527,368 us-gaap_StockholdersEquity |  |  |  |  |
Total liabilities and stockholders' equity | 6,906,532 us-gaap_LiabilitiesAndStockholdersEquity |  | 5,998,978 us-gaap_LiabilitiesAndStockholdersEquity |  |  |  |  |
Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 428,197 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember |  | 373,325 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember |  |  |  |  |
Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 2,881,051 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember |  | 2,610,797 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued |  |  |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued |  |  |  |  |  |  |  |
Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued |  |  |  |  |  |  |  |
Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 10,497 us-gaap_CommonStockValue / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember |  | 10,497 us-gaap_CommonStockValue / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember |  |  |  |  |
Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | (525,653)us-gaap_TreasuryStockValue / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember |  | (525,653)us-gaap_TreasuryStockValue / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember |  |  |  |  |
Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | (151,997)us-gaap_TreasuryStockValue / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember |  | (151,997)us-gaap_TreasuryStockValue / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember |  |  |  |  |
Property and Casualty Insurance [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 3,301 us-gaap_CommonStockValue / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember | [1] |  |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 713,702 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 464,710 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 571,420 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 427,560 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |
Reinsurance recoverables and trade receivables, net | 38,289 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 28,961 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Inventories, net | 69,817 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 67,020 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Prepaid expenses | 94,076 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 55,269 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Investments, fixed maturities and marketable equities | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Investments, other | 31,229 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 32,850 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Other assets | 145,436 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 93,857 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Related party assets | 150,411 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 172,507 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Subtotal assets | 1,242,960 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 915,174 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Investments in subsidiaries | 427,971 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 373,490 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 457,229 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 405,177 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Buildings and improvements | 1,641,420 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 1,430,330 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Furniture and equipment | 344,016 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 322,088 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Property, plant and equipment (gross) | 5,751,913 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 5,141,717 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Less: Accumulated depreciation | (1,891,178)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | (1,732,506)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Total property, plant and equipment | 3,860,735 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 3,409,211 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Total assets | 5,531,666 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 4,697,875 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 345,136 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 356,211 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Notes, loans and leases payable | 2,364,513 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 1,942,359 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 365,020 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 370,668 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Other policyholders' funds and liabilities | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Deferred income | 14,605 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 31,390 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Deferred income taxes | 522,173 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 455,295 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Related party liabilities | 13,811 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 14,584 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Total liabilities | 3,625,258 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 3,170,507 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 449,366 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 444,420 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Accumulated other comprehensive loss | (27,357)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | (53,923)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Retained earnings | 2,152,504 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 1,805,243 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Unearned employee stock ownership plan shares | (952)us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | (1,219)us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Total stockholders' equity | 1,906,408 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 1,527,368 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Total liabilities and stockholders' equity | 5,531,666 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 4,697,875 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 428,197 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 373,325 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 2,881,051 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  | 2,610,797 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 10,497 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember |  | 10,497 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | (525,653)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember |  | (525,653)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | (151,997)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember |  | (151,997)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember |  |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 10,259 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [2] | 12,758 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [2] | 5,601 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [3] | 14,120 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [3]
Reinsurance recoverables and trade receivables, net | 125,234 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 142,335 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Inventories, net | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Prepaid expenses | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Investments, fixed maturities and marketable equities | 216,455 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 192,173 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Investments, other | 54,277 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 54,674 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Other assets | 917 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 1,991 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Related party assets | 14,084 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 13,011 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Subtotal assets | 421,226 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 416,942 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Investments in subsidiaries | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Buildings and improvements | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Furniture and equipment | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Property, plant and equipment (gross) | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Less: Accumulated depreciation | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Total property, plant and equipment | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Total assets | 421,226 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 416,942 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 0 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Notes, loans and leases payable | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 273,303 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 295,216 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Other policyholders' funds and liabilities | 4,879 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 3,732 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Deferred income | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Deferred income taxes | (22,657)us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | (30,440)us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Related party liabilities | 2,058 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 1,647 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Total liabilities | 257,583 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 270,155 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 91,120 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 91,120 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Accumulated other comprehensive loss | 6,980 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 1,782 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Retained earnings | 62,242 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 50,584 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Unearned employee stock ownership plan shares | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Total stockholders' equity | 163,643 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 146,787 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Total liabilities and stockholders' equity | 421,226 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 416,942 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [4] | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | [4] | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | [4] | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | [4] | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued |  |  | 3,301 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember | [4] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember | [4] | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember | [1] |  |  |  |
Operating Segments [Member] | Property and Casualty Insurance [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember | [4] | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_PropertyAndCasualtyInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 5,062 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [2] | 17,644 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [2] | 24,594 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [3] | 22,064 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [3]
Reinsurance recoverables and trade receivables, net | 34,117 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 28,026 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Inventories, net | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Prepaid expenses | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Investments, fixed maturities and marketable equities | 1,078,113 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 946,102 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Investments, other | 161,260 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 161,326 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Deferred policy acquisition costs, net | 116,191 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 118,707 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Other assets | 2,587 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 1,740 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Related party assets | 543 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 515 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Subtotal assets | 1,397,873 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 1,274,060 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Investments in subsidiaries | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Buildings and improvements | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Furniture and equipment | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Property, plant and equipment (gross) | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Less: Accumulated depreciation | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Total property, plant and equipment | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Total assets | 1,397,873 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 1,274,060 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 8,428 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 1,743 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Notes, loans and leases payable | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 425,663 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 416,714 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Liabilities from investment contracts | 673,051 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 616,725 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Other policyholders' funds and liabilities | 5,590 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 4,256 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Deferred income | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Deferred income taxes | 20,420 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 7,741 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Related party liabilities | 393 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 178 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Total liabilities | 1,133,545 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 1,047,357 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 26,271 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 26,271 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Accumulated other comprehensive loss | 27,730 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 4,210 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Retained earnings | 207,827 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 193,722 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Unearned employee stock ownership plan shares | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Total stockholders' equity | 264,328 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 226,703 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Total liabilities and stockholders' equity | 1,397,873 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 1,274,060 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [4] | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | [4] | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | [4] | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | [4] | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 2,500 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember | [1] | 2,500 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember | [4] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember | [4] | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember | [1] |  |  |  |
Operating Segments [Member] | Life Insurance [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember | [4] | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_LifeInsuranceMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember | [1] |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 335,559 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 321,544 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 476,551 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 327,119 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |
Reinsurance recoverables and trade receivables, net | 0 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Inventories, net | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Prepaid expenses | 42,815 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 18,537 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Investments, fixed maturities and marketable equities | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Investments, other | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Other assets | 37,056 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 159 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Related party assets | 1,180,920 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 1,150,671 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Subtotal assets | 1,596,350 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 1,490,911 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Investments in subsidiaries | 833,496 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 493,612 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Buildings and improvements | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Furniture and equipment | 72 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 72 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Property, plant and equipment (gross) | 72 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 72 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Less: Accumulated depreciation | (59)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | (56)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Total property, plant and equipment | 13 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 16 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Total assets | 2,429,859 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 1,984,539 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 326 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 657 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Notes, loans and leases payable | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Other policyholders' funds and liabilities | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Deferred income | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Deferred income taxes | 522,173 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 455,295 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Related party liabilities | 0 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Total liabilities | 522,499 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 455,952 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 449,366 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 444,420 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Accumulated other comprehensive loss | (27,357)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | (53,923)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Retained earnings | 2,152,504 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 1,805,243 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Unearned employee stock ownership plan shares | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Total stockholders' equity | 1,907,360 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 1,528,587 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Total liabilities and stockholders' equity | 2,429,859 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 1,984,539 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 10,497 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | 10,497 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | (525,653)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | (525,653)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | AMERCO [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | (151,997)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  | (151,997)us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_AmercoBusinessSegmentMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 374,043 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 140,844 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 92,695 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 98,926 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |
Reinsurance recoverables and trade receivables, net | 38,112 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 28,784 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Inventories, net | 69,817 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 67,020 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Prepaid expenses | 50,056 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 36,236 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Investments, fixed maturities and marketable equities | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Investments, other | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 1,653 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Other assets | 64,092 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 59,746 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Related party assets | 93,561 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 115,657 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Subtotal assets | 689,681 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 449,940 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Investments in subsidiaries | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 66,792 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 56,242 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Buildings and improvements | 281,461 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 205,762 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Furniture and equipment | 323,753 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 311,053 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Property, plant and equipment (gross) | 3,981,254 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 3,557,179 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Less: Accumulated depreciation | (1,496,451)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | (1,349,920)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Total property, plant and equipment | 2,484,803 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 2,207,259 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Total assets | 3,174,484 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 2,657,199 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 338,920 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 351,050 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Notes, loans and leases payable | 1,305,089 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 1,060,240 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 365,020 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 370,668 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Other policyholders' funds and liabilities | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Deferred income | 14,594 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 31,390 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Deferred income taxes | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Related party liabilities | 607,678 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 588,919 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Total liabilities | 2,631,301 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 2,402,267 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 121,230 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 121,230 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Accumulated other comprehensive loss | (62,067)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | (59,914)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Retained earnings | 484,971 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 194,834 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Unearned employee stock ownership plan shares | (952)us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | (1,219)us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Total stockholders' equity | 543,183 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 254,932 us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Total liabilities and stockholders' equity | 3,174,484 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 2,657,199 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 428,197 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 373,325 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 2,881,051 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 2,610,797 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 1 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 1 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Uhaul [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = uhal_UhaulMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 4,100 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 2,322 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 2,174 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,515 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |
Reinsurance recoverables and trade receivables, net | 177 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 177 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Inventories, net | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Prepaid expenses | 1,205 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 496 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Investments, fixed maturities and marketable equities | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Investments, other | 31,229 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 31,197 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Other assets | 44,288 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 33,952 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Related party assets | 9 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 9 us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Subtotal assets | 81,008 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 68,153 uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Investments in subsidiaries | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 390,437 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 348,935 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Buildings and improvements | 1,359,959 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,224,568 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Furniture and equipment | 20,191 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 10,963 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Property, plant and equipment (gross) | 1,770,587 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,584,466 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Less: Accumulated depreciation | (394,668)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | (382,530)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Total property, plant and equipment | 1,375,919 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,201,936 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Total assets | 1,456,927 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,270,089 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 5,890 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 4,504 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Notes, loans and leases payable | 1,059,424 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 882,119 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Other policyholders' funds and liabilities | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Deferred income | 11 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Deferred income taxes | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Related party liabilities | 530,212 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 519,495 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Total liabilities | 1,595,537 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,406,118 us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | 147,941 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 147,941 us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Accumulated other comprehensive loss | 0 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Retained earnings | (286,552)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | (283,971)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Unearned employee stock ownership plan shares | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Total stockholders' equity | (138,610)us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | (136,029)us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Total liabilities and stockholders' equity | 1,456,927 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1,270,089 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 1 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 1 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Real Estate [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_RealEstateMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |
Reinsurance recoverables and trade receivables, net | 0 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Inventories, net | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Prepaid expenses | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Investments, fixed maturities and marketable equities | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Investments, other | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Other assets | 0 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Related party assets | (1,124,079)us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [5] | (1,093,830)us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [5] |  |  |  |
Subtotal assets | (1,124,079)uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | (1,093,830)uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Investments in subsidiaries | (405,525)us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] | (120,122)us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Buildings and improvements | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Furniture and equipment | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Property, plant and equipment (gross) | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Less: Accumulated depreciation | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Total property, plant and equipment | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Total assets | (1,529,604)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | (1,213,952)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 0 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Notes, loans and leases payable | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Other policyholders' funds and liabilities | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Deferred income | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Deferred income taxes | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Related party liabilities | (1,124,079)us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [5] | (1,093,830)us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [5] |  |  |  |
Total liabilities | (1,124,079)us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | (1,093,830)us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | (269,171)us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] | (269,171)us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] |  |  |  |
Accumulated other comprehensive loss | 62,067 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] | 59,914 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] |  |  |  |
Retained earnings | (198,419)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] | 89,137 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] |  |  |  |
Unearned employee stock ownership plan shares | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Total stockholders' equity | (405,525)us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | (120,122)us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Total liabilities and stockholders' equity | (1,529,604)us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | (1,213,952)us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | (2)us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] | (2)us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember | [6] |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Operating Segments [Member] | Moving and Storage Operating Eliminations [Member] | Moving and Storage Consolidations [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = uhal_MovingAndStorageConsolidationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember / us-gaap_SubsegmentsConsolidationItemsAxis = us-gaap_IntersubsegmentEliminationsMember |  |  |  |  |
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |
ASSETS: |  |  |  |  |  |  |  |
Cash and cash equivalents | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |
Reinsurance recoverables and trade receivables, net | 0 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 uhal_ReinsuranceRecoverablesAndTradeReceivablesNet / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Inventories, net | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_InventoryNet / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Prepaid expenses | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_OtherPrepaidExpenseCurrent / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Investments, fixed maturities and marketable equities | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_MarketableSecurities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Investments, other | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_Investments / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Deferred policy acquisition costs, net | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Other assets | 0 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_DepositsAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Related party assets | (16,262)us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [5] | (16,409)us-gaap_DueFromRelatedParties / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [5] |  |  |  |
Subtotal assets | (16,262)uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | (16,409)uhal_SubtotalAssets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Investments in subsidiaries | (427,971)us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] | (373,490)us-gaap_EquityMethodInvestments / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Land | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_Land / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Buildings and improvements | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_BuildingsAndImprovementsGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Furniture and equipment | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_FurnitureAndFixturesGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Property, plant and equipment (gross) | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Less: Accumulated depreciation | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Total property, plant and equipment | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Total assets | (444,233)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | (389,899)us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 0 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Notes, loans and leases payable | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Policy benefits and losses, claims and loss expenses payable | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Liabilities from investment contracts | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Other policyholders' funds and liabilities | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_PolicyholderFunds / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Deferred income | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_DeferredRevenue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Deferred income taxes | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_DeferredTaxLiabilities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Related party liabilities | (16,262)us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [5] | (16,409)us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [5] |  |  |  |
Total liabilities | (16,262)us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | (16,409)us-gaap_Liabilities / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Additional paid-in capital | (117,601)us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] | (117,601)us-gaap_AdditionalPaidInCapital / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] |  |  |  |
Accumulated other comprehensive loss | (34,710)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] | (5,992)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] |  |  |  |
Retained earnings | (269,859)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] | (244,096)us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember | [6] |  |  |  |
Unearned employee stock ownership plan shares | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | 0 us-gaap_UnearnedESOPShares / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Total stockholders' equity | (427,971)us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | (373,490)us-gaap_StockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Total liabilities and stockholders' equity | (444,233)us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  | (389,899)us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember |  |  |  |  |
Consolidation, Eliminations [Member] | Rental Trailers and Other Rental Equipment [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrailersAndOtherRentalEquipmentMember |  |  |  |  |
Consolidation, Eliminations [Member] | Rental Trucks [Member] |  |  |  |  |  |  |  |
Property, plant and equipment, at cost: |  |  |  |  |  |  |  |
Property subject to or available for operating lease, gross | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember |  | 0 us-gaap_PropertySubjectToOrAvailableForOperatingLeaseGross / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = uhal_RentalTrucksMember |  |  |  |  |
Consolidation, Eliminations [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |  |  |
Consolidation, Eliminations [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Preferred stock, value, issued | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  | 0 us-gaap_PreferredStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |  |  |
Consolidation, Eliminations [Member] | Series A Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  | 0 us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |  |  |  |
Consolidation, Eliminations [Member] | Amerco Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Common stock, value, issued | (5,801)us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember | [6] | (5,801)us-gaap_CommonStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = uhal_AmercoCommonStockMember | [6] |  |  |  |
Consolidation, Eliminations [Member] | Common Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember |  | 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = uhal_CommonStockInTreasuryMember |  |  |  |  |
Consolidation, Eliminations [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |
Treasury stock, value | $ 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember |  | $ 0 us-gaap_TreasuryStockValue / us-gaap_ConsolidationItemsAxis = us-gaap_ConsolidationEliminationsMember / us-gaap_StatementClassOfStockAxis = uhal_PreferredStockInTreasuryMember |  |  |  |  |
[1] | Balances as of December 31, 2013
[2] | Balance for the period ended September 30, 2014
[3] | Balance for the period ended September 30, 2013
[4] | Balances as of September 30, 2014
[5] | Eliminate intercompany receivables and payables
[6] | Eliminate investment in subsidiaries

X
- Definition This extended concept is a combination of two concepts on the US-GAAP taxonomy. (1) Reinsurance Recoverables defined as..."The known and estimated amount recoverable as of the balance sheet date from reinsurers for claims paid or incurred by the ceding insurer and associated claims settlement expenses, including estimated amounts for claims incurred but not reported, and policy benefits, net of any related valuation allowance." (2) Receivables, Net, Current defined as..."The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowance established for the purpose of reducing such receivables to an amount that approximates their net realizable value" + References No definition available. + Details
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- Definition On our HTML document, we leave this field name blank. It is considered the sum of all assets prior to our listing all Property, Plant and Equipment items. + References No definition available. + Details
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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(1),(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 1, 5 -Article 9 + Details
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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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X
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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X
- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.30(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Details
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- Definition Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Carrying (unamortized) amount as of the balance sheet date of deferred policy acquisition costs and value of business acquired (also called present value of future profits). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=27015749&loc=d3e569990-122904 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.7) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318 + Details
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- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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- Definition For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.3) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Carrying amount as of the balance sheet date of obligations due all related parties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Subparagraph 1 -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.17) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(3),(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 3, 4 -Article 9 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 + Details
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- Definition Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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