Financial liabilities - Summary of Short Term Debt (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Disclosure of detailed information about borrowings [line items] | ||
| Short-term debt | ¥ 5,699,083 | ¥ 5,464,469 |
| Short-term debt (Principally from bank) [Member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Short-term debt (Principally from bank) | 1,339,878 | 1,552,166 |
| Commercial paper [Member] | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Commercial paper | ¥ 4,359,205 | ¥ 3,912,303 |