v3.19.2
Leases - Components of Lease Cost (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Lease cost:    
Operating lease cost [1] $ 34 $ 68
Variable lease cost [2] 10 18
Total lease cost $ 44 $ 86
[1] Amount includes short-term leases, which are immaterial for the three and six months ended June 30, 2019.
[2] Amount includes lease payments, which may be adjusted based on usage, changes in an index or market rate