Contract Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Capitalized contract cost, amortization period	4 years
Capitalized Contract Cost, Net [Roll Forward]
Capitalized contract costs, beginning balance	$ 98	$ 91
Capitalized	58	40
Amortization	(45)	(33)
Capitalized contract costs, ending balance	$ 111	$ 98