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Schedule I - Condensed Financial Information of U-Haul Holding Company (Balance Sheets) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
ASSETS: |  |  |  |  |
Cash and cash equivalents | $ 1,534,544 | $ 2,060,524 |  |  |
Related party assets | 57,934 | 48,308 |  |  |
Total assets | 19,058,758 | 18,100,734 | $ 17,327,183 | $ 14,651,606 | $ 14,693,044
Liabilities |  |  |  |  |
Total liabilities | 11,886,313 | 11,596,543 |  | 9,732,515 | 9,846,608
Stockholders' equity: |  |  |  |  |
Additional paid-in capital | 462,548 | 453,643 |  |  |
Accumulated other comprehensive income (loss) | 223,216 | 285,623 |  | 106,857 | 42,319
Consolidated statement of change in equity |  |  |  |  |
Beginning of period | 7,003,148 |  | 5,025,568 |  |
Net Income (Loss) | 628,707 | 924,472 | 1,124,362 |  |
Series N Non-Voting Common Stock Dividends | (31,765) | (14,117) | 0 |  |
End of period | 7,600,090 | 7,003,148 |  |  |
Total stockholders' equity | 7,172,445 | 6,504,191 |  | 4,919,091 | 4,846,436
Total liabilities and stockholders' equity | 19,058,758 | 18,100,734 |  | $ 14,651,606 | $ 14,693,044
Nonvoting Common Stock [Member] |  |  |  |  |
Stockholders' equity: |  |  |  |  |
Common stock | 176 | 176 |  |  |
Consolidated statement of change in equity |  |  |  |  |
Net Income (Loss) | 0 | 0 | 0 |  |
Series N Non-Voting Common Stock Dividends | 0 | 0 |  |  |
Common Stock in Treasury [Member] |  |  |  |  |
Consolidated statement of change in equity |  |  |  |  |
Cost of shares in treasury | (525,653) | (525,653) |  |  |
Preferred Stock in Treasury [Member] |  |  |  |  |
Consolidated statement of change in equity |  |  |  |  |
Cost of shares in treasury | (151,997) | (151,997) |  |  |
U-Haul Holding Company [Member] |  |  |  |  |
ASSETS: |  |  |  |  |
Cash and cash equivalents | 975,109 | 1,662,790 |  |  |
Investments in subsidiaries | 4,784,174 | 4,551,742 |  |  |
Related party assets | 3,856,766 | 2,482,280 |  |  |
Other assets | 253,133 | 403,191 |  |  |
Total assets | 9,869,182 | 9,100,003 |  |  |
Liabilities |  |  |  |  |
Other liabilities | 2,702,780 | 2,601,631 |  |  |
Total liabilities | 2,702,780 | 2,601,631 |  |  |
Stockholders' equity: |  |  |  |  |
Preferred stock | 0 | 0 |  |  |
Common stock | 10,497 | 10,497 |  |  |
Additional paid-in capital | 462,758 | 453,853 |  |  |
Accumulated other comprehensive income (loss) | 229,259 | 291,442 |  |  |
Consolidated statement of change in equity |  |  |  |  |
Beginning of period | 7,002,938 | 6,112,191 |  |  |
Net Income (Loss) | 628,707 | 924,472 | 1,124,362 |  |
Dividends |  | (19,608) |  |  |
Series N Non-Voting Common Stock Dividends | (31,765) | (14,117) |  |  |
End of period | 7,599,880 | 7,002,938 | $ 6,112,191 |  |
Total stockholders' equity | 7,166,402 | 6,498,372 |  |  |
Total liabilities and stockholders' equity | 9,869,182 | 9,100,003 |  |  |
U-Haul Holding Company [Member] | Nonvoting Common Stock [Member] |  |  |  |  |
Stockholders' equity: |  |  |  |  |
Common stock | 176 | 176 |  |  |
U-Haul Holding Company [Member] | Common Stock in Treasury [Member] |  |  |  |  |
Consolidated statement of change in equity |  |  |  |  |
Cost of shares in treasury | (525,653) | (525,653) |  |  |
U-Haul Holding Company [Member] | Preferred Stock in Treasury [Member] |  |  |  |  |
Consolidated statement of change in equity |  |  |  |  |
Cost of shares in treasury | $ (151,997) | $ (151,997) |  |  |

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