XML 81 R65.htm IDEA: XBRL DOCUMENT
v3.23.1

Borrowings (Narratives) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Debt instruments, face, payment, and remaining balance amount: |  |  |  |
Notes, loans and leases payable | $ 6,108,042 | $ 6,022,497 |  |
Debt instruments, issuance and maturity dates: |  |  |  |
Remaining Lease Term Finance Lease Weighted Average | 2 | 3 |  |
Minimum [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
Unused capacity fee | 4.00% |  |  |
Maximum [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
Unused capacity fee | 10.00% |  |  |
Working capital loans two [Member] | U-Haul Holding Company [Member] | SOFR |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
Unused capacity fee | 0.30% |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |  |
Debt instrument, original face amount | $ 465,000 |  |  |
Line of credit facility, maximum borrowing capacity | 465,000 |  |  |
New capital lease obligations, amount | $ 150,000 |  |  |
Rental Truck (amortizing loans) First Loan [Member] | U-Haul Holding Company [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 1.61% |  |  |
Rental Truck (amortizing loans) First Loan [Member] | U-Haul Holding Company [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 5.68% |  |  |
Finance Lease [Member] | U-Haul Holding Company [Member] |  |  |  |
Lease Cost [Abstract] |  |  |  |
Sale Leaseback Transaction Lease Terms | (7) year terms |  |  |
Finance Lease [Member] | U-Haul Holding Company [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 2.18% |  |  |
Finance Lease [Member] | U-Haul Holding Company [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 5.04% |  |  |
Capital Lease Obligations [Member] | U-Haul Holding Company [Member] |  |  |  |
Lease Cost [Abstract] |  |  |  |
Sale Leaseback Transaction Lease Terms | (7) years |  |  |
Capital Lease Obligations [Member] | U-Haul Holding Company [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 1.60% |  |  |
Capital Lease Obligations [Member] | U-Haul Holding Company [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 5.98% |  |  |
Private placements [Member] | U-Haul Holding Company [Member] |  |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |  |
Line of credit facility, remaining borrowing capacity | $ 150,000 | $ 100,000 |  |
New capital lease obligations, amount | $ 600,000 | 600,000 |  |
Subsidiary holdings of parent company debt |  | $ 150,000 |  |
Private placements [Member] | U-Haul Holding Company [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 2.43% | 2.55% |  |
Debt instruments, issuance and maturity dates: |  |  |  |
Debt instrument, maturity year | 2029 | 2030 |  |
Private placements [Member] | U-Haul Holding Company [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 2.78% | 2.88% |  |
Debt instruments, issuance and maturity dates: |  |  |  |
Debt instrument, maturity year | 2033 | 2035 |  |
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] | SOFR |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 0.10% |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
Sum of LIBOR and margin, maximum rate | 4.29% |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 206,300 |  |  |
Amount held at fixed interest rate | $ 83,300 |  |  |
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] | SOFR | Minimum [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
LIBOR | 4.62% |  |  |
Applicable margin interest rate | 0.65% |  |  |
Applicable margin, per loan agreement, minimum rate | 5.58% |  |  |
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] | SOFR | Maximum [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
LIBOR | 4.83% |  |  |
Applicable margin interest rate | 1.38% |  |  |
Applicable margin, per loan agreement, maximum rate | 6.14% |  |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
Debt Weighted Average Interest Rate | 4.09% |  |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 2.70% |  |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Senior mortgages [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 5.50% |  |  |
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
LIBOR | 4.52% |  |  |
Sum of LIBOR and margin, minimum rate | 1.15% |  |  |
Applicable margin, per loan agreement, minimum rate | 5.77% |  |  |
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
LIBOR | 4.67% |  |  |
Sum of LIBOR and margin, maximum rate | 1.25% |  |  |
Applicable margin, per loan agreement, maximum rate | 5.97% |  |  |
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | SOFR |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 2.36% |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |  |
Aggregate borrowing capacity, amount | $ 615,000 |  |  |
Line of credit facility, maximum borrowing capacity | 615,000 |  |  |
Notes, loans and leases payable | 615,000 |  |  |
Amount held at fixed interest rate | $ 100,000 |  |  |
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | U-Haul Holding Company [Member] |  |  |  |
Debt instruments, interest rate, effective percentage: |  |  |  |
Debt instrument at period end, LIBOR plus margin | 0.10% |  |  |
Uhaul S Fleet Two Thousand Ten Box Truck Note [Member] | Other Obligations [Member] | Minimum [Member] |  |  |  |
Debt instruments, issuance and maturity dates: |  |  |  |
Debt instrument, maturity year | 2023 |  |  |
Uhaul S Fleet Two Thousand Ten Box Truck Note [Member] | Other Obligations [Member] | Maximum [Member] |  |  |  |
Debt instruments, issuance and maturity dates: |  |  |  |
Debt instrument, maturity year | 2049 |  |  |
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] |  |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |  |
Notes, loans and leases payable | $ 78,400 |  |  |
Subsidiary holdings of parent company debt | $ 1,700 |  |  |
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Minimum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 1.50% |  |  |
Amerco, Us Bank, National Association, Trustee [Member] | Other Obligations [Member] | Maximum [Member] |  |  |  |
Debt instruments, interest rate, stated percentage: |  |  |  |
Debt instrument, interest rate, stated percentage | 8.00% |  |  |
Life Insurance [Member] | FHLB [Member] |  |  |  |
Federal Home Loan Bank, Advances, Activity for the year [Abstract] |  |  |  |
Deposit amount |  |  | $ 60,000 |
Available for sale equity securities, noncurrent |  |  | 78,900 |
Available for sale equity securities pledged as collateral |  |  | $ 88,400 | $ 62,800
Life Insurance [Member] | FHLB [Member] | Minimum [Member] |  |  |  |
Federal Home Loan Bank, Advances, Activity for the year [Abstract] |  |  |  |
Deposit interest rate |  |  | 0.49% |
Life Insurance [Member] | FHLB [Member] | Maximum [Member] |  |  |  |
Federal Home Loan Bank, Advances, Activity for the year [Abstract] |  |  |  |
Deposit interest rate |  |  | 4.21% |

X
- Definition Fleet loan provision specified LIBOR plus applicable margin. This is the highest of the two applicable margin rates at the time of the loan agreement. + References No definition available. + Details
Name: | uhal_ApplicableMarginPerLoanAgreementMaximumRate
Namespace Prefix: | uhal_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fleet loan provision specified LIBOR plus applicable margin. This is the lower of the two applicable margin rates at the time of the loan agreement. + References No definition available. + Details
Name: | uhal_ApplicableMarginPerLoanAgreementMinimumRate
Namespace Prefix: | uhal_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Historic applicable margins. This is the higher of the rate range. + References No definition available. + Details
Name: | uhal_ApplicableMarginsHighRate
Namespace Prefix: | uhal_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Historic applicable margin. This is the lower of the rate range. + References No definition available. + Details
Name: | uhal_ApplicableMarginsLowRate
Namespace Prefix: | uhal_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The debt agreement amount at the beginning of this contract. It is no longer valid because of a subsequent amendment in the terms of this loan. + References No definition available. + Details
Name: | uhal_DebtInstrumentOriginalFaceAmount
Namespace Prefix: | uhal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The DebtInstrumentMaturityDate could have worked for this element, but it must include the format Month-Date-Year. Will use this US-GAAP Element in the next few schedules, when possible, where we break down the various items that make up the Borrowing's narrative. + References No definition available. + Details
Name: | uhal_MaturityYear
Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remaining lease term for finance lease. + References No definition available. + Details
Name: | uhal_RemainingLeaseTermFinanceLeaseWeightedAverage
Namespace Prefix: | uhal_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of corporate (parent company) debt held by our insurance subsidiaries. + References No definition available. + Details
Name: | uhal_SubsidiariesShareOfDebtPurchasedFromParent
Namespace Prefix: | uhal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26626-111562 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in lease obligation from new lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586 + Details
Name: | us-gaap_CapitalLeaseObligationsIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of short-term and long-term debt and lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
Name: | us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentageAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentageAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=120413173&loc=SL6242262-115580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI https://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=127002003&loc=SL6242269-115581 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRestricted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of advances from the Federal Home Loan Bank (FHLB). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
Name: | us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
Name: | us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LeaseCostAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LongTermDebtAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LongTermDebtCurrentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtPercentageBearingVariableInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References No definition available. + Details
Name: | us-gaap_LongtermDebtPercentageBearingFixedInterestAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage charged for managing real estate properties. + References No definition available. + Details
Name: | us-gaap_PropertyManagementFeePercentFee
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123416376&loc=d3e50796-112755 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=128295416&loc=SL77919786-209982 + Details
Name: | us-gaap_SaleLeasebackTransactionLeaseTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_MediumTermNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_FinanceLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=uhal_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=uhal_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=uhal_UhaulIntlAndSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=uhal_RentalTruckRevolversMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=uhal_UhaulSFleetTwoThousandTenBoxTruckNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=uhal_AmercoUsBankNationalAssociationTrusteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=uhal_LifeInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis=srt_FederalHomeLoanBankOfSanFranciscoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |