Borrowings - Short-term Borrowings and Long-term Borrowings (with Original Maturities of More Than One Year) (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | ¥ 10,551,657 | ¥ 12,697,699 |
| Unsubordinated borrowings [member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | 8,972,906 | 11,043,243 |
| Subordinated borrowings [member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | 98,556 | 130,971 |
| Liabilities associated with securitization transactions [member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | 1,108,260 | 1,129,695 |
| Lease liabilities [member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings | ¥ 371,935 | ¥ 393,790 |