Discontinued Operations - Summary of Income (loss) from Discontinued Operations on Condensed Consolidated Statements of Comprehensive Income (loss) (Details) - Divested Business - Discontinued Operations, Disposed of by Sale - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 3	$ 33	$ 40	$ 539
Cost of services, exclusive of depreciation and amortization	3	33	40	387
Depreciation and amortization	0	0	0	3
Gross Profit	0	0	0	149
Operating Expenses
Selling, general and administrative	0	0	0	89
Depreciation and intangible amortization	0	0	0	8
Total Operating Expenses	0	0	0	97
Income (loss) from Discontinued Operations	0	0	0	52
Other (income) expense, net	0	0	0	2
Income (Loss) from Discontinued Operations Before Income Taxes	0	0	0	50
(Gain) Loss on sale of disposition, net of tax	0	(4)	8	(4)
Income tax expense (benefit)	13	34	14	52
Net Income (Loss) from Discontinued Operations, Net of Tax	$ (13)	$ (30)	$ (22)	$ 2