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Income Taxes - Schedule of Reconciliation of the Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of the unrecognized tax benefits      
Balance, beginning of year $ 17 $ 22 $ 23
Decrease based on prior year tax position 0 (2) 0
Increase in current year tax positions 0 0 2
Reductions related to expirations from statute of limitations 0 (3) (3)
Balance, end of year $ 17 $ 17 $ 22