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Income Taxes - Summary of the Components of Our (Benefit) Provision for Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current income tax expense (benefit):      
Federal $ (73) $ 31 $ 37
State (3) 5 12
Foreign (3) 26 17
Current income tax expense (benefit) (79) 62 66
Deferred income tax expense (benefit):      
Federal 13 25 (10)
State (10) 7 (1)
Foreign (4) (26) 5
Deferred income tax expense (benefit): (1) 6 (6)
(Benefit) provision for income taxes $ (80) $ 68 $ 60