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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]        
Unrecognized Tax Benefits $ 15 $ 15 $ 14 $ 14
Decrease in Unrecognized Tax Benefits is Reasonably Possible 5      
Foreign Tax Authority [Member]        
Operating Loss Carryforwards [Line Items]        
Deferred Tax Assets, Operating Loss Carryforwards 11      
Deferred Tax Assets, Valuation Allowance $ 3