Investments Accounted for Using the Equity Method - Share of Comprehensive Income of Affiliates and Joint Ventures (Detail) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Disclosure of investments accounted for using equity method [line items] | |||
| Profit for the year | ¥ (162,080) | ¥ 982 | ¥ 110,817 |
| Other comprehensive income | 63,427 | 11,902 | 62,653 |
| Comprehensive income for the year | (98,653) | 12,884 | 173,470 |
| Affiliates [member] | |||
| Disclosure of investments accounted for using equity method [line items] | |||
| Profit for the year | (17,014) | 15,838 | 26,490 |
| Other comprehensive income | 24,471 | 18,305 | 31,797 |
| Comprehensive income for the year | 7,457 | 34,143 | 58,287 |
| Joint ventures [member] | |||
| Disclosure of investments accounted for using equity method [line items] | |||
| Profit for the year | (145,066) | (14,856) | 84,327 |
| Other comprehensive income | 38,956 | (6,403) | 30,856 |
| Comprehensive income for the year | ¥ (106,110) | ¥ (21,259) | ¥ 115,183 |