Financial Risk Management - Unused Portions of the Committed Lines of Credit (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Commercial paper programs [member] | ||
| Disclosure of unused portion of borrowing facility [line items] | ||
| Unused portions of the committed lines of credit | ¥ 1,769,851 | ¥ 1,433,976 |
| Other committed lines of credit [member] | ||
| Disclosure of unused portion of borrowing facility [line items] | ||
| Unused portions of the committed lines of credit | 423,804 | 72,482 |
| Committed lines of credit [member] | ||
| Disclosure of unused portion of borrowing facility [line items] | ||
| Unused portions of the committed lines of credit | ¥ 2,193,655 | ¥ 1,506,458 |