Segment and Related Information - Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 1,943	$ 1,704	$ 3,729	$ 3,275
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,200	1,014	2,308	1,957
European region
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	450	422	855	794
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	187	178	371	348
Rest of the world
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 106	$ 90	$ 195	$ 176