Revenue from Contracts with Customers - Schedule of Contract Assets Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Capitalized Cost To Fulfill Customer Contracts
Change in Capitalized Contract Costs
Balance at beginning of period	$ 264	$ 242	$ 370	$ 355
Additions	400	357	1,166	1,074
Amortization	(367)	(321)	(1,235)	(1,156)
Impairment	0	0	0	0
Foreign currency translation and other	5	(5)	1	0
Balance at end of period	302	273	302	273
Capitalized Cost To Obtain Customer Contracts
Change in Capitalized Contract Costs
Balance at beginning of period	196	186	195	185
Additions	19	14	51	37
Amortization	(13)	(13)	(40)	(38)
Impairment	0	0	0	0
Foreign currency translation and other	0	(1)	(4)	2
Balance at end of period	$ 202	$ 186	$ 202	$ 186