Schedule II - U-Haul Holding Company and Consolidated Subsidiaries Valuation and Qualifying Accounts	12 Months Ended
	Mar. 31, 2023
Disclosure Text Block [Abstract]
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block]	SCHEDULE II U-Haul Holding Company AND CONSOLIDATED SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS       Balance at Beginning of Year   Additions Charged to Costs and Expenses   Additions Charged to Other Accounts   Deductions   Balance at Year End                       Year ended March 31, 2023   (In thousands) Allowance for obsolescence                     (deducted from inventory) $ 1,080 $ – $ – $ (151) $ 929 Allowance for LIFO                     (deducted from inventory) $ 37,400 $ 9,665 $ – $ – $ 47,065                       Year ended March 31, 2022     Allowance for obsolescence                     (deducted from inventory) $ 1,416 $ – $ – $ (336) $ 1,080 Allowance for LIFO                     (deducted from inventory) $ 21,832 $ 15,568 $ – $ – $ 37,400                       Year ended March 31, 2021                     Allowance for credit losses                     (deducted from trade receivable) $ 535 $ 2,179 $ 2,680 $ (973) $ 4,421 Allowance for obsolescence                     (deducted from inventory) $ 3,063 $ – $ – $ (1,647) $ 1,416 Allowance for LIFO                     (deducted from inventory) $ 18,886 $ 2,946 $ – $ – $ 21,832 Allowance for probable losses                     (deducted from mortgage loans)$ 493 $ – $ – $( 45 )$ 448