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Revenue from Contracts with Customers - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue recognized $ 61    
Impairment loss $ 2 $ 4  
ASU 2014-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Reduction of retained deficit     $ 102
Reduction of retained deficit, net of tax     $ 78