Financial Risk and Fair Value Disclosures - Details of Forward Exchange Contracts (Detail) - Forward exchange contracts [member] - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of detailed information about financial instruments [line items] | ||
| Notional Amount on sale of foreign currency | $ 22 | $ 24 |
| Contract Period, beginning date | Dec. 08, 2025 | Dec. 27, 2024 |
| Contract Period, end date | Jan. 23, 2026 | Jan. 21, 2025 |