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v3.25.2

Income Taxes (Captions of Net Deferred Tax Assets and Liabilities Reflected in Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Millions | Mar. 31, 2025 | Mar. 31, 2024
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Income Tax Disclosure [Abstract] |  |
Other assets | ¥ 63,337 | ¥ 66,519
Income taxes: Deferred | 525,632 | 505,190
Net deferred tax liability | ¥ 462,295 | ¥ 438,671

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