Income Taxes - Summary of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Stock-based compensation	$ 47	$ 44
Net operating loss carryforwards	49	38
Provision for accrued expenses	6	6
Deferred rent		3
Lease financing obligation	24	22
Foreign advertising spend	15	15
Deferred expense related to cost-sharing arrangement		31
Interest carryforward	20	14
Other	14	10
Total deferred tax assets	175	183
Less: valuation allowance	(72)	(57)
Net deferred tax assets	103	126
Deferred tax liabilities:
Intangible assets	(51)	(57)
Property and equipment	(27)	(22)
Prepaid expenses	(2)	(2)
Building - corporate headquarters	(22)	(23)
Deferred income related to cost-sharing arrangement		(16)
Other	(2)
Total deferred tax liabilities	(104)	(120)
Net deferred tax liability	$ (1)
Net deferred tax asset		$ 6