Income Taxes - Additional Information (Details) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 27, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Taxes [Line Items]
Temporary benefit, term of net operating loss carryback provisions,under CARES Act	5 years
Term of qualified leasehold improvements property, Prior to enactment of CARES Act	39 years
Term of qualified leasehold improvements property, After enactment of CARES Act	15 years
Percentage eligible for tax bonus depreciation, and potentially other provisions under CARES Act	100.00%
Income tax expense (benefit)		$ (26,000,000)	$ 34,000,000	$ (38,000,000)	$ 41,000,000
Income tax rate differential benefit amount		(5,000,000)		(19,000,000)
Accrued interest liability		24,000,000		24,000,000
Accrued penalties		$ 0		0
Cumulative income tax expense recorded upon non-company related litigation						$ 15,000,000
Minimum [Member] | Expedia | IRS | Tax Years 2009 through 2013
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated				50,000,000
Maximum | Expedia | IRS | Tax Years 2009 through 2013
Income Taxes [Line Items]
Increase in income tax expense due to proposed adjustments related to transfer pricing with foreign subsidiary, estimated				$ 60,000,000