Borrowings	3 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
4. Borrowings	Long Term Debt Long term debt was as follows:   Fiscal Year 2024             Weighted Avg     June 30,   March 31,   Interest Rates     Maturities   Interest Rates (b)     2023   2023                         (Unaudited)                             (In thousands) Real estate loans (amortizing term) (a) 4.30 % - 6.64 %   2027 - 2037   5.78 %   $ 286,677 $   289,647 Senior mortgages 2.70 % - 5.50 %   2024 - 2042   4.14 %     2,457,739   2,371,231 Real estate loans (revolving credit) - % - - %   - - 2027   – %     –   – Fleet loans (amortizing term) 1.61 % - 5.68 %   2023 - 2029   3.73 %     100,225   111,856 Fleet loans (revolving credit) 2.36 % - 6.50 %   2026 - 2028   5.72 %     590,000   615,000 Finance leases (rental equipment) 2.37 % - 5.01 %   2023 - 2026   3.92 %     189,037   223,205 Finance liabilities (rental equipment) 1.60 % - 6.13 %   2024 - 2031   4.12 %     1,425,854   1,255,763 Private placements 2.43 % - 2.88 %   2029 - 2035   2.65 %     1,200,000   1,200,000 Other obligations 1.50 % - 8.00 %   2023 - 2049   6.06 %     74,250   76,648 Notes, loans and finance leases payable                           6,323,782   6,143,350 Less: Debt issuance costs                             (36,551)   (35,308) Total notes, loans and finance leases payable, net                 $ 6,287,231 $   6,108,042       (a) Certain loans have interest rate swaps fixing the rate for the relevant loans between 2.72% and 2.86% based on current margin. The weighted average interest rate calculation for these loans was 4.08% using the swap adjusted interest rate.     (b) Weighted average rates as of June 30, 2023                                                                       Real Estate Backed Loans Real Estate Loans Certain subsidiaries of Real Estate and U-Haul Company of Florida are borrowers under real estate loans. These loans require monthly or quarterly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. These loans are secured by various properties owned by the borrowers. The interest rates, per the provisions of $ 204.2 million of these loans, are the applicable Secured Overnight Funding Rate (“SOFR”) plus the applicable margins and a credit spread adjustment of 0.10 %. As of June 30, 2023, the applicable SOFR was between 5.15 % and 5.16 % and applicable margin was between 0.65 % and 1.38 %, the sum of which, including the credit spread, was between 5.90 % and 6.64 %. The remaining $ 82.5 million of these loans was fixed with an interest rate of 4.30 %. The default provisions of these real estate loans include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. Senior Mortgages Various subsidiaries of Real Estate and U-Haul are borrowers under certain senior mortgages. The senior mortgages require monthly principal and interest payments. The senior mortgages are secured by certain properties owned by the borrowers. The fixed interest rates, per the provisions of the senior mortgages, range between 2.70 % and 5.50 %. Certain senior mortgages have an anticipated repayment date and a maturity date. If these senior mortgages are not repaid by the anticipated repayment date, the interest rate on these mortgages would increase from the current fixed rate. We are using the anticipated repayment date for our maturity schedule. Real Estate and U-Haul have provided limited guarantees of the senior mortgages. The default provisions of the senior mortgages include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. There are limited restrictions regarding our use of the funds. Real Estate Loans (Revolving Credit) U-Haul Holding Company is a borrower under a multi-bank syndicated real estate loan. As of June 30, 2023, the maximum credit commitment is $465.0 million. As of June 30, 2023, the full capacity was available to borrow. This loan agreement provides for revolving loans, subject to the terms of the loan agreement. If there was a loan outstanding as of June 30, 2023, the applicable SOFR was 5.10% and applicable margin would be between 1.40% and 1.55% the sum of which would be 6.50% to 6.65% This loan requires monthly interest payments with the unpaid loan balance and accrued and unpaid interest due at maturity. The default provisions of the loan include non-payment of principal or interest and other   standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. There is a 0.30 % fee charged for unused capacity. Fleet Loans Rental Truck Amortizing Loans The amortizing loans require monthly principal and interest payments, with the unpaid loan balance and accrued and unpaid interest due at maturity. These loans were used to purchase new trucks. The interest rates are fixed rates.   All of our rental truck amortizing loans are collateralized by the rental equipment purchased.   The majority of these loans are funded at 70%, but some may be funded at 100%. U-Haul Holding Company, and in some cases U-Haul, is guarantor of these loans. The default provisions of these loans include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. The net book value of the corresponding rental equipment was $226.1million and $ 213.1 million as of June 30, 2023 and March 31, 2023, respectively. Rental Truck Revolvers Various subsidiaries of U-Haul entered into three revolving fleet loans with an aggregate borrowing capacity of $ 615.0 million. The interest rates are SOFR plus the applicable margin and a credit spread adjustment of 0.10 %. As of June 30, 2023, SOFR was between 5.03 % and 5.16 % and the margin was between 1.15 % and 1.25 %, the sum of which, including the credit spread, was between 6.28 % and 6.50 %. Of the $ 590.0 million outstanding, $ 100.0 million was fixed with an interest rate of 2.36 %. Only interest is paid on the loans until the last nine months of the respective loan terms when principal becomes due monthly. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. These fleet loans are collateralized by the rental equipment purchased. The net book value of the corresponding rental equipment was $ 735.1 million and $ 822.0 million as of June 30, 2023 and March 31, 2023, respectively. Finance Leases The Finance Lease balance represents our sale-leaseback transactions of rental equipment. The agreements are generally seven (7) year terms .   All of our finance leases are collateralized by our rental fleet. The net book value of the corresponding rental equipment was $ 420.5 million and $ 474.8 million as of June 30, 2023 and March 31, 2023, respectively. There were no new financing leases entered into during the first quarter of fiscal 2024. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. Finance Liabilities Finance liabilities represent our rental equipment financing transactions, and we assess if these sale-leaseback transactions qualify as a sale at initiation by determining if a transfer of ownership occurs.   We have determined that our equipment sale-leasebacks do not qualify as a sale, as the buyer-lessors do not obtain control of the assets in our ongoing sale-leaseback arrangements. As a result, these sale-leasebacks are accounted for as a financial liability and the leased assets are capitalized at cost.     Our finance liabilities have an average term of seven (7) years . These finance liabilities are collateralized by the related assets of our rental fleet.   The net book value of the corresponding rental equipment was $ 1,628.6 million and $ 1,499.1 million as of June 30, 2023 and March 31, 2023, respectively. The default provisions of these loans include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. Private Placements In September 2021, U-Haul Holding Company entered into a note purchase agreement to issue $600.0 million of fixed rate senior unsecured notes in a private placement offering.   These notes consist of four tranches each totaling $150.0 million and funded in September 2021.   The fixed interest rates range between 2.43% and 2.78% with maturities between 2029 and 2033.   Interest is payable semiannually. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. In December 2021, U-Haul Holding Company entered into a note purchase agreement to issue $600.0 million of fixed rate senior unsecured notes in a private placement offering. These notes consist of three tranches each totaling $100.0 million and two tranches each totaling $150.0 million.  The fixed interest rates range between 2.55% and 2.88% with maturities between 2030 and 2035.  Interest is payable semiannually. The default provisions of the loan include non-payment of principal or interest and other standard reporting and change-in-control covenants. We are in compliance with the covenants as of June 30, 2023. Other Obligations In February 2011, U-Haul Holding Company and U.S. Bank Trust Company, NA, as successor in interest to U.S. Bank National Association (the “Trustee”), entered into the U-Haul Investors Club ® Indenture.   U-Haul Holding Company and the Trustee entered into this indenture to provide for the issuance of notes by us directly to investors over our proprietary website, uhaulinvestorsclub.com (“U-Notes ® ”). The U-Notes ® are secured by various types of collateral, including, but not limited to, certain rental equipment and real estate.   U-Notes ® are issued in smaller series that vary as to principal amount, interest rate and maturity.   U-Notes ® are obligations of the Company and secured by the associated collateral; they are not guaranteed by any of the Company’s affiliates or subsidiaries. As of June 30, 2023, the aggregate outstanding principal balance of the U-Notes ® issued was $ 76.0 million, of which $ 1.7 million is held by our insurance subsidiaries and eliminated in consolidation. Annual Maturities of Notes, Loans and Finance Leases Payable The annual maturities of our notes, loans and finance leases payable, before debt issuance costs as of June 30, 2023 for the next five years and thereafter are as follows:     Years Ending June 30,         2024   2025   2026   2027   2028   Thereafter   Total     (Unaudited)     (In thousands) Notes, loans and finance leases payable $ 635,909 $ 474,221 $ 762,745 $ 766,958 $ 833,278 $ 2,850,671 $ 6,323,782 Interest on Borrowings Interest Expense Components of interest expense include the following:     Quarter Ended June 30,     2023   2022     (Unaudited)     (In thousands) Interest expense $ 64,400 $ 50,405 Capitalized interest   (4,063)   (2,618) Amortization of transaction costs   1,411   1,446 Interest expense resulting from cash flow hedges   (1,150)   566 Total interest expense $ 60,598 $ 49,799 Interest paid in cash amounted to $ 55.4 million and $ 41.7 million for the first quarter of fiscal 2023 and 2022, respectively.   Interest paid (received) in cash on derivative contracts was ($1.0) million and $0.6 million for the first quarter of fiscal 2024 and 2023, respectively. Interest Rates Interest rates and Company borrowings related to our revolving credit facilities were as follows:     Revolving Credit Activity       Quarter Ended June 30,       2023   2022       (Unaudited)       (In thousands, except interest rates)   Weighted average interest rate during the quarter   6.26 % 1.99 % Interest rate at the end of the quarter   6.41 % 2.29 % Maximum amount outstanding during the quarter $ 715,000 $ 1,095,000   Average amount outstanding during the quarter $ 660,330 $ 1,095,000   Facility fees $ 265 $ 58