Equity - Total Number of Treasury Stock Held (Detail) - shares |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|---|---|---|---|---|
| Disclosure of classes of share capital [line items] | ||||
| Common shares | 4,533,000,000 | 5,280,000,000 | 5,280,000,000 | 1,811,428,430 |
| Treasury stock [member] | ||||
| Disclosure of classes of share capital [line items] | ||||
| Common shares | 640,419,559 | 933,490,429 | 451,092,624 |