Employee Benefits - Summary of Disclosure of Information About Maturity Profile of Defined Benefit Obligation (Detail) |
12 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Japanese Defined Benefit Plans [Member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Weighted average duration of defined benefit obligation | 16 years 10 months 24 days | 17 years 1 month 6 days |
| Foreign plans [Member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Weighted average duration of defined benefit obligation | 13 years 1 month 6 days | 13 years 8 months 12 days |