Income Taxes	3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 8: INCOME TAXES Each interim period is considered an integral part of the annual period and, accordingly, we measure our tax expense using an estimated annual effective tax rate. An enterprise is required, at the end of each interim reporting period, to make its best estimate of the annual effective tax rate for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis, as adjusted for discrete taxable events that occur during the interim period. Our effective tax rate for the three months ended March 31, 2015 and 2014 was 26.7% and 27.7%, respectively. For the three months ended March 31, 2015, the effective tax rate is less than the federal statutory rate primarily due to earnings in jurisdictions outside the United States, where our effective tax rate is lower, which was partially offset by state income taxes, non-deductible stock compensation and accruals on uncertain tax positions. The decrease in the effective tax rate for 2015 compared to the 2014 rate was primarily due to a change in jurisdictional earnings. Our policy is to recognize accrued interest and penalties related to unrecognized tax benefits and income tax liabilities as part of our income tax expense. As of March 31, 2015, accrued interest is $3 million, net of federal benefit, and no penalties have been accrued. We do not anticipate any material releases in the next twelve months. We are under examination by the Internal Revenue Service (“IRS”) for the 2009 and 2010 tax years with respect to consolidated income tax returns previously filed with Expedia, and we have various ongoing state income tax audits. We are separately under examination by the IRS for the 2012 and 2013 tax years. These audits include questioning of the timing and the amount of income and deductions and the allocation of income among various tax jurisdictions. These examinations may lead to proposed or ordinary course adjustments to our taxes. We are no longer subject to tax examinations by tax authorities for years prior to 2007. As of March 31, 2015, no material assessments have resulted. While we have not yet received notification of a proposed adjustment from the IRS for the 2009 and 2010 calendar years relating to transfer pricing with our foreign subsidiaries, we have been informed by the IRS that a Notice of Proposed Adjustment is imminent. Our expectation is that the notice will propose an increase to our U.S. taxable income that would result in additional federal tax expense for 2009 and 2010, subject to interest. Based on our interpretation of the regulations and available case law, we believe the position we have taken with regard to transfer pricing with our foreign subsidiaries is sustainable and we intend to vigorously defend our position. If we are not able to resolve a proposed adjustment at the IRS examination level, we plan to pursue all available administrative and, if necessary, judicial remedies.

NOTE 8: INCOME TAXES

Each interim period is considered an integral part of the annual period and, accordingly, we measure our tax expense using an estimated annual effective tax rate. An enterprise is required, at the end of each interim reporting period, to make its best estimate of the annual effective tax rate for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis, as adjusted for discrete taxable events that occur during the interim period.

Our effective tax rate for the three months ended March 31, 2015 and 2014 was 26.7% and 27.7%, respectively. For the three months ended March 31, 2015, the effective tax rate is less than the federal statutory rate primarily due to earnings in jurisdictions outside the United States, where our effective tax rate is lower, which was partially offset by state income taxes, non-deductible stock compensation and accruals on uncertain tax positions. The decrease in the effective tax rate for 2015 compared to the 2014 rate was primarily due to a change in jurisdictional earnings.

Our policy is to recognize accrued interest and penalties related to unrecognized tax benefits and income tax liabilities as part of our income tax expense. As of March 31, 2015, accrued interest is $3 million, net of federal benefit, and no penalties have been accrued. We do not anticipate any material releases in the next twelve months.

We are under examination by the Internal Revenue Service (“IRS”) for the 2009 and 2010 tax years with respect to consolidated income tax returns previously filed with Expedia, and we have various ongoing state income tax audits. We are separately under examination by the IRS for the 2012 and 2013 tax years. These audits include questioning of the timing and the amount of income and deductions and the allocation of income among various tax jurisdictions. These examinations may lead to proposed or ordinary course adjustments to our taxes. We are no longer subject to tax examinations by tax authorities for years prior to 2007.

As of March 31, 2015, no material assessments have resulted. While we have not yet received notification of a proposed adjustment from the IRS for the 2009 and 2010 calendar years relating to transfer pricing with our foreign subsidiaries, we have been informed by the IRS that a Notice of Proposed Adjustment is imminent. Our expectation is that the notice will propose an increase to our U.S. taxable income that would result in additional federal tax expense for 2009 and 2010, subject to interest. Based on our interpretation of the regulations and available case law, we believe the position we have taken with regard to transfer pricing with our foreign subsidiaries is sustainable and we intend to vigorously defend our position. If we are not able to resolve a proposed adjustment at the IRS examination level, we plan to pursue all available administrative and, if necessary, judicial remedies.