Liabilities for Quality Assurance - Summary of Net Changes in Liabilities for Recalls and Other Safety Measures (Detail) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Liabilities for recalls and other safety measures [Abstract] | |||
| Liabilities for recalls and other safety measures at beginning of year | ¥ 1,271,690 | ¥ 1,194,156 | ¥ 1,171,213 |
| Additional provisions | 317,414 | 288,278 | 231,874 |
| Utilization | (349,387) | (188,902) | (178,124) |
| Reversals | (6,402) | (31,248) | (35,643) |
| Other | 3,150 | 9,406 | 4,836 |
| Liabilities for recalls and other safety measures at end of year | ¥ 1,236,465 | ¥ 1,271,690 | ¥ 1,194,156 |