Financial liabilities - Summary of Short Term Debt (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about borrowings [line items] | ||
| Short-term debt | ¥ 5,464,469 | ¥ 5,487,959 |
| Short-term debt (Principally from bank) [Member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Short-term debt (Principally from bank) | 1,552,166 | 1,387,832 |
| Commercial paper [Member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Commercial paper | ¥ 3,912,303 | ¥ 4,100,127 |