Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narratives (Details)

v3.20.1
Revenue Recognition - Narratives (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]      
Allowance for credit losses, period increase (decrease) $ 23    
Allowance for credit losses 119 $ 119 $ 93
Provisions for doubtful receivables 69 $ 37  
Contract assets 222   272
Deferred revenue 298   264
Contract with Customer, Liability, Noncurrent $ 26   $ 26