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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, 2023 | Mar. 31, 2022 | Mar. 31, 2021
ASSETS: |  |  |
Cash and cash equivalents | $ 2,060,524 | $ 2,704,137 |
Investments in subsidiaries | 0 | 0 |
Related party assets | 48,308 | 47,851 |
Total assets | 18,124,648 | 17,299,581 | $ 14,651,606
Liabilities: |  |  |
Other Liabilities | 11,596,313 | 11,347,089 |
Stockholders' equity: |  |  |
Additional paid-in capital | 453,643 | 453,819 |
Accumulated other comprehensive loss | (267,046) | 46,384 |
Consolidated statement of change in equity |  |  |
Beginning of period | 6,119,442 |  |
Net earnings | 922,998 | 1,123,286 | 610,856
Series N Non-Voting Common Stock Dividends | (14,117) | 0 | 0
End of period | 7,008,715 | 6,119,442 |
Total stockholders' equity | 6,528,335 | 5,952,492 |
Total liabilities and stockholders' equity | 18,124,648 | 17,299,581 |
Nonvoting Common Stock [Member] |  |  |
Stockholders' equity: |  |  |
Common stock | 176 | 0 |
Consolidated statement of change in equity |  |  |
Net earnings | 0 | 0 | 0
Series N Non-Voting Common Stock Dividends | 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 | 1,662,790 | 2,085,447 |
Investments in subsidiaries | 4,575,886 | 4,308,020 |
Related party assets | 2,482,280 | 1,842,445 |
Other assets | 403,191 | 178,691 |
Total assets | 9,124,147 | 8,414,603 |
Liabilities: |  |  |
Other Liabilities | 2,601,631 | 2,463,308 |
Stockholders' equity: |  |  |
Preferred stock | 0 | 0 |
Common stock | 10,497 | 10,497 |
Additional paid-in capital | 453,853 | 454,029 |
Accumulated other comprehensive loss | (272,865) | 45,187 |
Consolidated statement of change in equity |  |  |
Beginning of period | 6,119,232 | 5,025,358 |
Net earnings | 922,998 | 1,123,286 | 610,856
Dividends | (19,608) | (29,412) |
Series N Non-Voting Common Stock Dividends | (14,117) | 0 |
End of period | 7,008,505 | 6,119,232 | $ 5,025,358
Total stockholders' equity | 6,522,516 | 5,951,295 |
Total liabilities and stockholders' equity | 9,124,147 | 8,414,603 |
U-Haul Holding Company [Member] | Nonvoting Common Stock [Member] |  |  |
Stockholders' equity: |  |  |
Common stock | 176 | 0 |
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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