Notes to Condensed Financial Information - U-Haul Holding Company [Member]	12 Months Ended
	Mar. 31, 2023
1. Summary of Significant Accounting Policies	U-Haul Holding Company, a Nevada corporation, was incorporated in April, 1969, and is the holding Company for U-Haul International, Inc., Amerco Real Estate Company, Repwest Insurance Company and Oxford Life Insurance Company. The financial statements of the Registrant should be read in conjunction with the Consolidated Financial Statements and notes thereto included in this Annual Report. U-Haul Holding Company is included in a consolidated Federal income tax return with all of its U.S. subsidiaries. Accordingly, the provision for income taxes has been calculated for Federal income taxes of U-Haul Holding Company and subsidiaries included in the consolidated return of U-Haul Holding Company. State taxes for all subsidiaries are allocated to the respective subsidiaries. The financial statements include only the accounts of U-Haul Holding Company, which include certain of the corporate operations of U-Haul Holding Company. The interest in U-Haul Holding Company’s majority owned subsidiaries is accounted for using the equity method. The intercompany interest income and expenses are eliminated in the Consolidated Financial Statements.
2. Guarantees	U-Haul Holding Company has guaranteed performance of certain long-term leases and other obligations. See Note 18, Leases, and Note 20, Related Party Transactions, of the Notes to Consolidated Financial Statements.