Supplemental Cash Flow Information - Details of Changes in Working Capital and Other Items (Detail) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure Of Changes In Working Capital And Other Items [abstract] | ||||
| Trade and other receivables | $ (18) | $ 26 | ||
| Prepaid expenses and other current assets | (65) | 2 | ||
| Payables, accruals and provisions | (78) | (144) | ||
| Deferred revenue | 152 | 64 | ||
| Income taxes | [1] | 88 | 283 | |
| Other | (36) | (55) | ||
| Total | $ 43 | $ 176 | ||
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