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Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance at beginning of period $ 42 $ 39 $ 35
Additions for prior year tax positions 9 1 20
Lapse of statute of limitations (1) 0 (1)
Settlements 0 0 (15)
Foreign currency translation (2)   0
Foreign currency translation   2  
Balance at end of period $ 48 $ 42 $ 39