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Schedule II - U-Haul Holding Company and Consolidated Subsidiaries, Valuation and Qualifying Accounts (Details) - U-Haul Holding Company [Member] - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Allowance for obsolescence (deducted from inventory) [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year |  | $ 929 | $ 1,080
Deductions |  |  | (151)
Balance at year end |  |  | 929
Allowance for LIFO (deducted from inventory) [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | $ 46,331 | 47,065 | 37,400
Additions charged to cost and expenses | 1,598 |  | 9,665
Deductions |  | (734) |
Balance at year end | $ 47,929 | $ 46,331 | $ 47,065

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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