Employee Benefits - Summary of Amounts Recognized in the Consolidated Statement of Financial Position are Comprised (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Disclosure of defined benefit plans [line items] | ||
| Retirement benefit liabilities | ¥ 1,019,568 | ¥ 1,077,962 |
| Japanese plans [Member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Retirement benefit liabilities | 562,375 | 597,641 |
| Other non-current assets (Retirement benefit assets) | (341,723) | (559,550) |
| Net amount recognized | 220,652 | 38,092 |
| Foreign plans [Member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Retirement benefit liabilities | 457,193 | 480,320 |
| Other non-current assets (Retirement benefit assets) | (106,376) | (114,222) |
| Net amount recognized | ¥ 350,817 | ¥ 366,098 |