Property and Equipment - Schedule of PPE (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment	$ 194	$ 187
Less: Accumulated depreciation	(141)	(122)
Property and equipment, net	53	65
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 57	55
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	$ 94	87
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	$ 8	12
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 30	27
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	$ 5	$ 6
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