Income Taxes - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Taxes [Line Items]
Income tax refund		$ 48,000,000		$ 48,000,000
Reduction in long-term transition tax payable			$ 28,000,000
Income tax benefit		16,000,000	$ 11,000,000
Accrued interest liability		37,000,000
Accrued penalties		0
Minimum | HMRC | Tax Years 2012 Through 2016
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 | HMRC | Tax Years 2012 Through 2016
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
COVID-19 Pandemic
Income Taxes [Line Items]
Government grants and other assistance benefits recognized		3,000,000
Government grants and other assistance benefits received		2,000,000
COVID-19 Pandemic | Prepaid Expenses and Other Current Assets
Income Taxes [Line Items]
Government grants and other assistance benefits receivable		$ 3,000,000		$ 2,000,000