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Income Taxes - Details of Income (loss) before Income Taxes by Jurisdiction (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]    
Canadian $ 56 $ (184)
Foreign 1,486 1,790
Income before income taxes, Total $ 1,542 $ 1,606