Defined Benefit Liabilities (Assets) - Principal Actuarial Assumptions (Detail) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Bottom of range [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Discount rate for defined benefit obligations | 3.51% | 3.35% |
| Expected rate of salary increase | 2.00% | 2.00% |
| Top of range [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Discount rate for defined benefit obligations | 4.57% | 4.24% |
| Expected rate of salary increase | 6.22% | 5.42% |