Property and Equipment, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense			$ 72	$ 52
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 27	$ 19	$ 72	$ 51