XML 42 R31.htm IDEA: XBRL DOCUMENT v3.20.1
Revenue from Contracts with Customers - Contract Balances (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]    
Accounts receivable, net $ 448 $ 398
Contract assets 9 8
Deferred revenue, current 555 472
Long-term deferred revenue $ 44 $ 61