Revenue Recognition - Capitalized Contract Costs (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2022
Acquisition Costs
Capitalized Contract Cost [Roll Forward]
Beginning of period balance	$ 182	$ 192	$ 202	$ 182	$ 202
Costs incurred	35	29		68	65
Amortization	(32)	(39)		(65)	(80)
Change in contract costs held for sale	0	1		0	(4)
End of period balance	185	183	192	185	183	$ 202
Acquisition Costs | Held-for-sale | EMEA Business
Capitalized Contract Cost [Roll Forward]
Classified as held for sale		10	11		10	6
Fulfillment Costs
Capitalized Contract Cost [Roll Forward]
Beginning of period balance	189	182	192	184	192
Costs incurred	49	39		85	79
Amortization	(34)	(36)		(65)	(71)
Change in contract costs held for sale	0	1		0	(14)
End of period balance	$ 204	186	182	$ 204	186	192
Fulfillment Costs | Held-for-sale | EMEA Business
Capitalized Contract Cost [Roll Forward]
Classified as held for sale		$ 14	$ 15		$ 14	$ 0