Quarterly report pursuant to Section 13 or 15(d)

Revenue - Transaction Price Allocation and Contract Balances (Details)

v3.19.2
Revenue - Transaction Price Allocation and Contract Balances (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Revenue    
Original expected duration true  
Receivables from contracts with customers $ 309 $ 475