Liabilities for Quality Assurance - Summary of Net Change in Liabilities for Quality Assurances (Detail) ¥ in Millions |
12 Months Ended |
|---|---|
|
Mar. 31, 2026
JPY (¥)
| |
| Liabilities for quality assurances [Abstract] | |
| Liabilities for quality assurance at beginning of year | ¥ 1,965,748 |
| Additional provisions | 1,008,635 |
| Utilization | (782,028) |
| Reversals | (84,448) |
| Unwinding of discount and effect of change in discount rate | 38,722 |
| Other | (48,686) |
| Liabilities for quality assurance at end of year | ¥ 2,097,943 |