Basis of Preparation - Additional Information (Detail) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Basis of preparation [line items] | |||
| Other, net | ¥ (15,357) | ¥ (14) | ¥ (42,995) |
| Loss (gain) on disposal of property, plant and equipment and intangible assets | ¥ 335,897 | 22,079 | (5,224) |
| Previously stated [member] | |||
| Basis of preparation [line items] | |||
| Other, net | ¥ 22,065 | ¥ (48,219) | |