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Property and Equipment, net - Detail of Property and Equipment (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	$ 399	$ 334
Less: accumulated amortization and depreciation	(138)	(119)
Property and equipment, net	261	215
Website development costs
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	256	175
Leasehold improvements
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	90	107
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	26	26
Computer equipment
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	19	19
Construction-in-progress
Property, Plant and Equipment [Line Items]
Less: accumulated amortization and depreciation	$ 8	$ 7

X

- Definition

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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