Employee Benefits - Summary of Actuarial Assumptions (Detail) |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Bottom of Range [Member] | ||
| Disclosure Of Defined Benefit Plans [Line Items] | ||
| Discount rate (per annum) | 6.40% | 6.40% |
| Future salary growth (per annum) | 7.00% | 7.00% |
| Withdrawal rate | 3.00% | 6.00% |
| Top of Range [Member] | ||
| Disclosure Of Defined Benefit Plans [Line Items] | ||
| Discount rate (per annum) | 7.30% | 6.50% |
| Future salary growth (per annum) | 12.00% | 12.00% |
| Withdrawal rate | 25.00% | 25.00% |