Revenue from Contracts with Customers - Contract Assets Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Capitalized Cost To Fulfill Customer Contracts
Change in Capitalized Contract Costs
Balance at beginning of period	$ 355	$ 361
Additions	362	348
Amortization	(462)	(457)
Impairment	0	0
Foreign currency translation and other	2	2
Balance at end of period	257	254
Capitalized Cost To Obtain Customer Contracts
Change in Capitalized Contract Costs
Balance at beginning of period	185	179
Additions	10	15
Amortization	(12)	(12)
Impairment	0	0
Foreign currency translation and other	0	2
Balance at end of period	$ 183	$ 184