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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

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