Other Finance Income and Costs - Summary of Other Finance Income and Costs (Detail) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Other finance income | |||
| Other | ¥ 156,639 | ¥ 71,637 | ¥ 165,370 |
| Total | 594,243 | 556,700 | 747,236 |
| Other finance costs | |||
| Financial liabilities measured at amortized cost | (60,293) | (84,106) | (64,733) |
| Other | (26,453) | (106,605) | (38,975) |
| Total | (86,746) | (190,711) | (103,709) |
| Interest income [Member] | |||
| Other finance income | |||
| Financial assets measured at amortized cost | 203,976 | 256,034 | 289,035 |
| Financial assets measured at fair value through other comprehensive income | 107,543 | 108,594 | 165,653 |
| Dividend income [Member] | |||
| Other finance income | |||
| Financial assets measured at fair value through other comprehensive income | ¥ 126,085 | ¥ 120,435 | ¥ 127,178 |