Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Capitalized Contract Cost [Line Items]
Contract liabilities	$ 144		$ 144		$ 144
Contract liability amortization period (months)			30 months
Deferred incremental direct costs, amortization period (years)	4 years		4 years
Deferred incremental direct costs net of accumulated amortization	$ 124		$ 124		132
Contract Fulfillment Costs and Inducements
Capitalized Contract Cost [Line Items]
Capitalized contract costs, amounts deferred	12		12		$ 15
Capitalized contract costs, amortization	$ 2	$ 2	$ 3	$ 3