Property and Equipment - Schedule of PPE (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment	$ 215	$ 194
Less: Accumulated depreciation	(157)	(141)
Property and equipment, net	58	53
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 64	57
Furniture, fixtures, and equipment | Min
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Furniture, fixtures, and equipment | Max
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 100	94
Capitalized software costs | Min
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Capitalized software costs | Max
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Software in development and other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 21	8
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 30	30
Leasehold improvements | Max
Property, Plant and Equipment [Line Items]
Estimated Useful Life	10 years
Long-term finance leases - computer equipment
Property, Plant and Equipment [Line Items]
Long-term finance leases - computer equipment	$ 0	$ 5
Long-term finance leases - computer equipment | Min
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Long-term finance leases - computer equipment | Max
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years