Segment Information and Concentrations - Revenue by Geography (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,901	$ 1,589	$ 5,122	$ 4,576
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	1,185	962	3,121	2,740
Europe, Middle East and Africa (EMEA)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	494	424	1,358	1,234
Asia Pacific (APJ)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 222	$ 203	$ 643	$ 602