Revenues - Significant Movements in Deferred Revenue Balances (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Beginning balance	$ 443	$ 419
Amounts billed but not recognized as revenues	385	327
Revenues recognized related to the beginning balance of deferred revenue	388	357
Contract With Customer, Liability, Foreign Currency Translation	(8)	0
Ending balance	$ 432	$ 389