Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narratives (Details)

v3.19.3
Revenue Recognition - Narratives (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]          
Provisions for doubtful receivables $ 40 $ 35 $ 145 $ 76  
Contract assets 264   264   $ 234
Deferred revenue 300   300   236
Contract with Customer, Liability, Noncurrent $ 26   $ 26   $ 26