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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

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