Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 213	$ 108
Accumulated Amortization	(94)	(80)
Net carrying amount	$ 119	$ 28
Weighted Average Remaining Life in Years	4 years 6 months	4 years 6 months
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 197	$ 96
Accumulated Amortization	(85)	(73)
Net carrying amount	$ 112	$ 23
Weighted Average Remaining Life in Years	4 years 7 months 6 days	4 years 8 months 12 days
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 9	$ 9
Accumulated Amortization	(7)	(7)
Net carrying amount	$ 2	$ 2
Weighted Average Remaining Life in Years	3 years 6 months	4 years 6 months
Other(1)
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7	$ 3
Accumulated Amortization	(2)	0
Net carrying amount	$ 5	$ 3
Weighted Average Remaining Life in Years	2 years 7 months 6 days	2 years 9 months 18 days