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v3.24.1.1.u2

Borrowings (Narratives) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Debt instruments, face, payment, and remaining balance amount: |  |  |
Notes, loans and leases payable | $ 6,271,362,000 | $ 6,108,042,000 |
Debt instruments, issuance and maturity dates: |  |  |
Remaining Lease Term Finance Lease Weighted Average | 1 | 2 |
Real estate loan (amortizing term) [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Debt Weighted Average Interest Rate | 5.90% |  |
Real estate loans (revolving credit) [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Debt Weighted Average Interest Rate | 0.00% |  |
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 | $ 465,000,000 |  |
Rental Truck (amortizing loans) First Loan [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Debt Weighted Average Interest Rate | 3.84% |  |
Rental Truck (amortizing loans) First Loan [Member] | U-Haul Holding Company [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Funding Percentage of Loans. | 70.00% |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Net book value of rental equipment |  | $ 213,100,000 |
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% |  |
Debt instruments, interest rate, effective percentage: |  |  |
Funding Percentage of Loans. | 100.00% |  |
Finance Lease [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Debt Weighted Average Interest Rate | 4.69% |  |
Finance Lease [Member] | U-Haul Holding Company [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Net book value of rental equipment | $ 289,300,000 | 474,800,000 |
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 | 2.86% |  |
Finance Lease [Member] | U-Haul Holding Company [Member] | Maximum [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage | 5.01% |  |
Capital Lease Obligations [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Debt Weighted Average Interest Rate | 4.10% |  |
Capital Lease Obligations [Member] | U-Haul Holding Company [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Net book value of rental equipment | $ 1,989,800,000 | 1,499,100,000 |
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 | 6.80% |  |
Private placements [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Debt Weighted Average Interest Rate | 2.65% |  |
Private placements [Member] | U-Haul Holding Company [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Aggregate borrowing capacity, amount | $ 1,200,000,000 |  |
Line of credit facility, remaining borrowing capacity |  | 100,000,000 |
New capital lease obligations, amount |  | 600,000,000 |
Subsidiary holdings of parent company debt |  | $ 150,000,000 |
Private placements [Member] | U-Haul Holding Company [Member] | Minimum [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage |  | 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 |  | 2.88% |
Debt instruments, issuance and maturity dates: |  |  |
Debt instrument, maturity year | 2035 | 2035 |
Amerco Real Estate Subsidiaries and Uhaul Company of Florida [Member] | Real estate loan (amortizing term) [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Aggregate borrowing capacity, amount | $ 197,900,000 |  |
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% |  |
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: |  |  |
Applicable margin interest rate | 0.65% |  |
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: |  |  |
Applicable margin interest rate | 1.38% |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Real estate loan (amortizing term) [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage | 4.30% |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Amounts held at LIBOR plus margin | $ 79,900,000 |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Real estate loan (amortizing term) [Member] | SOFR |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Applicable margin interest rate | 5.33% |  |
Sum of LIBOR and margin, minimum rate | 6.08% |  |
Sum of LIBOR and margin, maximum rate | 6.80% |  |
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 | 6.05% |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Amount held at fixed interest rate | $ 22,200,000 |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Rental Truck Revolvers [Member] | SOFR |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage | 5.33% |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Aggregate borrowing capacity, amount | $ 573,900,000 |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Private placements [Member] | U-Haul Holding Company [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Line of credit facility, remaining borrowing capacity | 150,000,000 |  |
New capital lease obligations, amount | $ 600,000,000 |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Private placements [Member] | U-Haul Holding Company [Member] | Minimum [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage | 2.43% |  |
Debt instruments, issuance and maturity dates: |  |  |
Debt instrument, maturity year | 2029 |  |
Various Subsidiaries of Amerco Real Estate and Uhaul Intl [Member] | Private placements [Member] | U-Haul Holding Company [Member] | Maximum [Member] |  |  |
Debt instruments, interest rate, stated percentage: |  |  |
Debt instrument, interest rate, stated percentage | 2.78% |  |
Debt instruments, issuance and maturity dates: |  |  |
Debt instrument, maturity year | 2033 |  |
Uhaul Intl and Subsidiaries [Member] | Rental Truck (amortizing loans) First Loan [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Net book value of rental equipment | $ 155,800 |  |
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] |  |  |
Debt instruments, face, payment, and remaining balance amount: |  |  |
Net book value of rental equipment |  | $ 822,000,000 |
Uhaul Intl and Subsidiaries [Member] | Rental Truck Revolvers [Member] | Maximum [Member] |  |  |
Debt instruments, interest rate, effective percentage: |  |  |
Sum of LIBOR and margin, maximum rate | 1.25% |  |
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 | $ 615,000,000 |  |
Notes, loans and leases payable | $ 615,000,000 |  |
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] | Maximum [Member] |  |  |
Debt instruments, issuance and maturity dates: |  |  |
Debt instrument, maturity year | 2049 |  |
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] | Uhual International, Inc [Member] |  |  |
Federal Home Loan Bank, Advances, Activity for the year [Abstract] |  |  |
Deposit amount |  |  | $ 60,000,000
Life Insurance [Member] | Uhual International, Inc [Member] | Minimum [Member] |  |  |
Federal Home Loan Bank, Advances, Activity for the year [Abstract] |  |  |
Deposit interest rate |  |  | 0.49%
Life Insurance [Member] | Uhual International, Inc [Member] | Maximum [Member] |  |  |
Federal Home Loan Bank, Advances, Activity for the year [Abstract] |  |  |
Deposit interest rate |  |  | 4.30%

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- 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
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- 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 -Topic 840 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481295/840-40-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -SubTopic 40 -Topic 842 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479741/842-40-50-2 + Details
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