Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 9 – Commitments and Contingencies Legal Proceedings In the ordinary course of business, we are a party to various lawsuits. Management does not expect these lawsuits to have a material impact on the liquidity, results of operations, or financial condition of Expedia Group. We also evaluate other potential contingent matters, including value-added tax, excise tax, sales tax, transient occupancy or accommodation tax and similar matters. We do not believe that the aggregate amount of liability that could be reasonably possible with respect to these matters would have a material adverse effect on our financial results; however, litigation is inherently uncertain and the actual losses incurred in the event that our legal proceedings were to result in unfavorable outcomes could have a material adverse effect on our business and financial performance. Litigation Relating to Occupancy Taxes. One hundred one lawsuits have been filed by or against cities, counties and states involving hotel occupancy and other taxes. Eight lawsuits are currently active. These lawsuits are in various stages and we continue to defend against the claims made in them vigorously. With respect to the principal claims in these matters, we believe that the statutes or ordinances at issue do not apply to us or the services we provide and, therefore, that we do not owe the taxes that are claimed to be owed. We believe that the statutes or ordinances at issue generally impose occupancy and other taxes on entities that own, operate or control hotels (or similar businesses) or furnish or provide hotel rooms or similar accommodations. To date, forty-seven of these lawsuits have been dismissed. Some of these dismissals have been without prejudice and, generally, allow the governmental entity or entities to seek administrative remedies prior to pursuing further litigation. Thirty-three dismissals were based on a finding that we and the other defendants were not subject to the local tax ordinance or that the local government lacked standing to pursue its claims. As a result of this litigation and other attempts by certain jurisdictions to levy such taxes, we have established a reserve for the potential settlement of issues related to hotel occupancy and other taxes, consistent with applicable accounting principles and in light of all current facts and circumstances, in the amount of $52 million and $48 million as of March 31, 2020 and December 31, 2019, respectively. Our settlement reserve is based on our best estimate of probable losses and the ultimate resolution of these contingencies may be greater or less than the liabilities recorded. An estimate for a reasonably possible loss or range of loss in excess of the amount reserved cannot be made. Changes to the settlement reserve are included within legal reserves, occupancy tax and other in the consolidated statements of operations. Pay-to-Play. Certain jurisdictions may assert that we are required to pay any assessed taxes prior to being allowed to contest or litigate the applicability of the ordinances. This prepayment of contested taxes is referred to as “pay-to-play.” Payment of these amounts is not an admission that we believe we are subject to such taxes and, even when such payments are made, we continue to defend our position vigorously. If we prevail in the litigation, for which a pay-to-play payment was made, the jurisdiction collecting the payment will be required to repay such amounts and also may be required to pay interest. We are in various stages of inquiry or audit with domestic and foreign tax authorities, some of which, including in the City of Los Angeles regarding hotel occupancy taxes and in the United Kingdom regarding the application of value added tax (“VAT”) to our European Union related transactions as discussed below, may impose a pay-to-play requirement to challenge an adverse inquiry or audit result in court. Matters Relating to International VAT. We are in various stages of inquiry or audit in multiple European Union jurisdictions, including in the United Kingdom, regarding the application of VAT to our European Union related transactions. While we believe we comply with applicable VAT laws, rules and regulations in the relevant jurisdictions, the tax authorities may determine that we owe additional taxes. In certain jurisdictions, including the United Kingdom, we may be required to “pay-to-play” any VAT assessment prior to contesting its validity. While we believe that we will be successful based on the merits of our positions with regard to the United Kingdom and other VAT audits in pay-to-play jurisdictions, it is nevertheless reasonably possible that we could be required to pay any assessed amounts in order to contest or litigate the applicability of any assessments and an estimate for a reasonably possible amount of any such payments cannot be made. Competition and Consumer Matters. On August 23, 2018, the Australian Competition and Consumer Commission, or "ACCC", instituted proceedings in the Australian Federal Court against trivago. The ACCC alleged breaches of Australian Consumer Law, or "ACL," relating to trivago’s advertisements in Australia concerning the hotel prices available on trivago’s Australian site, trivago’s strike-through pricing practice and other aspects of the way offers for accommodation were displayed on trivago's Australian website. The matter went to trial in September 2019 and, on January 20, 2020, the Australian Federal Court issued a judgment finding trivago had engaged in conduct in breach of the ACL. On March 4, 2020, trivago filed a notice of appeal of part of that judgment at the Australian Federal Court. The appeal is scheduled to be heard on July 20-21, 2020. The court has yet to set a date for a separate trial regarding penalties and other orders.We recorded the estimated probable loss associated with the proceedings in a previous period. An estimate for the reasonable possible loss or range of loss in excess of the amount reserved cannot be made.