Annual report pursuant to Section 13 and 15(d)

Revenue - Transaction Price Allocation and Contract Balances (Details)

v3.20.4
Revenue - Transaction Price Allocation and Contract Balances (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenue    
Original expected duration true  
Receivables with customers $ 74 $ 101