Revenue Recognition - Contract Cost (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Contract acquisition costs
Capitalized Contract Cost
Beginning of period balance	$ 70,000,000	$ 76,000,000
Costs incurred	12,000,000	17,000,000
Amortization	(12,000,000)	(15,000,000)
Change in contract costs held for sale	0	(4,000,000)
End of period balance	70,000,000	74,000,000
Contract acquisition costs | Disposal Group, Held-for-sale, Not Discontinued Operations | EMEA Business
Capitalized Contract Cost
Beginning of period balance	6,000,000
End of period balance	10,000,000
Contract fulfillment costs
Capitalized Contract Cost
Beginning of period balance	97,000,000	106,000,000
Costs incurred	17,000,000	23,000,000
Amortization	(15,000,000)	(16,000,000)
Change in contract costs held for sale	0	(14,000,000)
End of period balance	99,000,000	$ 99,000,000
Contract fulfillment costs | Disposal Group, Held-for-sale, Not Discontinued Operations | EMEA Business
Capitalized Contract Cost
Beginning of period balance	0
End of period balance	$ 14,000,000