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Property and Equipment, net - Detail of Property and Equipment (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	$ 468	$ 430
Less: accumulated amortization and depreciation	(178)	(159)
Property and equipment, net	290	271
Website development costs
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	334	291
Leasehold improvements
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	90	90
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	23	24
Computer equipment
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	18	18
Construction-in-progress
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	$ 3	$ 7

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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