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Taxation (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Income Tax Contingency [Line Items]    
Balance, beginning of year $ 73 $ 67
Additions based on tax positions related to the current year 1 0
Additions based on tax positions related to prior years 57 9
Reductions for settlements with taxing authorities (1) (3)
Balance, end of year $ 130 $ 73