Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Buildings (freehold) [member] | Bottom of range [member] | |
| Disclosure of detailed information about property, plant and equipment [line items] | |
| Estimated useful lives | 20 years |
| Buildings (freehold) [member] | Top of range [member] | |
| Disclosure of detailed information about property, plant and equipment [line items] | |
| Estimated useful lives | 50 years |
| Buildings (leasehold) [member] | |
| Disclosure of detailed information about property, plant and equipment [line items] | |
| Estimated useful lives | over the period of the lease |
| Plant and equipment [member] | Bottom of range [member] | |
| Disclosure of detailed information about property, plant and equipment [line items] | |
| Estimated useful lives | 3 years |
| Plant and equipment [member] | Top of range [member] | |
| Disclosure of detailed information about property, plant and equipment [line items] | |
| Estimated useful lives | 10 years |