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Compensation Plans - (Schedule of Outstanding Deferred Share Units) (Parenthetical) (Details) - Deferred Share Units [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]      
Payments of cash-settled $ 2 $ 0 $ 2
Outstanding intrinsic value $ 6 $ 7