Revenue Recognition - Contract Cost (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Capitalized Contract Cost
Allowance for credit losses	$ 17,000,000		$ 17,000,000		$ 19,000,000
Contract acquisition costs
Capitalized Contract Cost
Beginning balance	74,000,000	$ 77,000,000	76,000,000	$ 76,000,000
Costs incurred	10,000,000	14,000,000	27,000,000	29,000,000
Amortization	(15,000,000)	(13,000,000)	(30,000,000)	(27,000,000)
Change in contract costs held for sale	0	0	(4,000,000)	0
Ending balance	69,000,000	78,000,000	69,000,000	78,000,000
Contract acquisition costs | Disposal Group, Held-for-sale, Not Discontinued Operations | EMEA Business
Capitalized Contract Cost
Beginning balance	10,000,000		6,000,000
Ending balance	10,000,000		10,000,000
Contract acquisition costs | Discontinued Operations, Held-for-sale | Latin American Business
Capitalized Contract Cost
Beginning balance		0		0
Ending balance		0		0
Contract fulfillment costs
Capitalized Contract Cost
Beginning balance	99,000,000	100,000,000	106,000,000	99,000,000
Costs incurred	21,000,000	22,000,000	44,000,000	43,000,000
Amortization	(18,000,000)	(20,000,000)	(34,000,000)	(40,000,000)
Change in contract costs held for sale	0	(1,000,000)	(14,000,000)	(1,000,000)
Ending balance	102,000,000	101,000,000	102,000,000	101,000,000
Contract fulfillment costs | Disposal Group, Held-for-sale, Not Discontinued Operations | EMEA Business
Capitalized Contract Cost
Beginning balance	14,000,000		0
Ending balance	$ 14,000,000		$ 14,000,000
Contract fulfillment costs | Discontinued Operations, Held-for-sale | Latin American Business
Capitalized Contract Cost
Beginning balance		27,000,000		27,000,000
Ending balance		$ 28,000,000		$ 28,000,000