Employee Benefits - Weighted Average Duration of Defined Benefit Obligations (Detail) |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Japanese plans [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Weighted average duration of defined benefit obligations | 10 years | 11 years |
| Foreign plans [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Weighted average duration of defined benefit obligations | 10 years | 10 years |