Income Taxes - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Decrease in income tax payable attributable to exercise or settlement of stock-based awards		$ (25,000,000)	$ (24,000,000)	$ (15,000,000)
Valuation allowance on deferred tax assets		106,000,000	72,000,000
Increase related to additional foreign net operating losses			34,000,000
Cumulative undistributed foreign earnings not considered to be indefinitely reinvested		376,000,000
Foreign earnings intended to indefinitely reinvest in non-US subsidiaries		118,000,000
Cumulative income tax expense recorded upon non-company related litigation			15,000,000
Unrecognized tax benefits		144,000,000	140,000,000	$ 136,000,000	$ 123,000,000
Unrecognized tax benefits that would impact effective tax rate		74,000,000
Total gross interest and penalties accrued		35,000,000	29,000,000
Minimum | HMRC | Tax Years 2012 Through 2016 | Subsequent Event
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated	$ 45,000,000
Minimum | Expedia | IRS | Tax Years 2009 through 2016
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated		95,000,000
Minimum | Expedia | IRS | 2009 through 2011 Pre Spin-Off Tax Years
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated		20,000,000
Maximum
Income Taxes [Line Items]
Anticipated decrease in unrecognized tax benefits within next twelve months			$ 4,000,000
Maximum | HMRC | Tax Years 2012 Through 2016 | Subsequent Event
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated	$ 55,000,000
Maximum | Expedia | IRS | Tax Years 2009 through 2016
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated		105,000,000
Maximum | Expedia | IRS | 2009 through 2011 Pre Spin-Off Tax Years
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated		30,000,000
Singapore
Income Taxes [Line Items]
Expected tax refund		48,000,000
Reduction in long-term transition tax payable		$ 28,000,000
Singapore's effective tax rate		5.00%
Income tax expense at federal statutory rate		17.00%
Tax incentive agreement expiration date		Jun. 30, 2021
Reduction of tax rate in an additional income tax expense as result of loss position		$ 2,000,000
Federal
Income Taxes [Line Items]
Operating loss carryforwards		$ 4,000,000
Expiration date of NOLs		between 2021 and 2036
Federal | Singapore
Income Taxes [Line Items]
Expected income tax expense (benefit)		$ (76,000,000)
State
Income Taxes [Line Items]
Operating loss carryforwards		$ 208,000,000
Expiration date of NOLs		between 2021 and 2036
Foreign
Income Taxes [Line Items]
Operating loss carryforwards		$ 297,000,000
Expiration date of NOLs		between 2021 and 2032