Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Revenues from Contracts with Customers - Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]    
Contract assets $ 8 $ 0
Change In Contract With Customer, Liability [Roll Forward]    
Deferred revenues, beginning of period 139  
Cash received but not yet recognized 136  
Revenue recognized from prior period deferral (139)  
Deferred revenues, end of period $ 136