PROPERTY AND EQUIPMENT, NET - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 72	$ 77
Less: Accumulated depreciation	(55)	(50)
Less: Impairments	0	(3)
Property and equipment, net	17	24
Office equipment, including data processing equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	37	36
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	19	21
Furniture, fixtures, and equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	14	16
Projects in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 2	$ 4