Revenue from Contracts with Customers - Schedule of Contract Assets Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Capitalized Cost To Fulfill Customer Contracts
Change in Capitalized Contract Costs
Balance at beginning of period	$ 450	$ 424
Additions	457	418
Amortization	(581)	(544)
Impairment	0	0
Foreign currency translation and other	(1)	4
Balance at end of period	325	302
Capitalized Cost To Obtain Customer Contracts
Change in Capitalized Contract Costs
Balance at beginning of period	208	207
Additions	15	13
Amortization	(13)	(13)
Impairment	0	0
Foreign currency translation and other	(1)	1
Balance at end of period	$ 209	$ 208