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Income Taxes - Provision for income taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income (loss) before income taxes:      
U.S. $ (15) $ 74 $ 121
Foreign 521 508 500
Income before income taxes 506 582 621
Current tax expense:      
U.S. federal 1 6 17
State and local 2 2 1
Foreign 156 147 172
Total current tax expense 159 155 190
Deferred tax expense (benefit):      
U.S. federal (18) (8) (14)
State and local (1)   (2)
Foreign 12 11 (7)
Total deferred tax expense (benefit) (7) 3 (23)
Total provision for income taxes $ 152 $ 158 $ 167