Annual report pursuant to Section 13 and 15(d)

Revenues from Contracts with Customers - Contract Assets and Liabilities (Details)

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Revenues from Contracts with Customers - Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]    
Contract assets $ 18 $ 0
Change In Contract With Customer, Liability [Roll Forward]    
Deferred revenues, beginning of period 139 111
Cash received but not yet recognized 161 139
Revenue recognized from prior period deferral (139) 111
Deferred revenues, end of period $ 161 $ 139