Discount Factor Discount factor applied to revenue portion for the Travel business above an internal target. Revenue Less Ancillary Services, Including Revenue From Acquisition Consolidated revenue, including revenue from acquisition, in accordance with GAAP less (i) pass-through cost for printing and mailing services and (ii) marketing fees. Equity Award Adjustments [Member] Equity award adjustments. Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year [Member] Fair value as of vesting date of equity awards granted and vested in the year. Fair Value at the End of the Prior Year of Equity Awards that Failed to Meet Vesting Conditions in the Year [Member] Fair value at the end of the prior year of equity awards that failed to meet vesting conditions in the year. Reported Value of Equity Awards [Member] Reported value of equity awards. Value of Dividends or Other Earnings Paid on Stock or Option Awards not Otherwise Reflected in Fair Value or Total Compensation [Member] Value of dividends or other earnings paid on stock or option awards not otherwise reflected in fair value or total compensation. Year End Fair Value of Unvested Equity Awards Granted in the Year [Member] Year end fair value of unvested equity awards granted in the year. Year over Year Change in Fair Value of Equity Awards Granted in Prior Years that Vested in the Year [Member] Year over year change in fair value of equity awards granted in prior years that vested in the year. Year over Year Change in Fair Value of Outstanding and Unvested Equity Awards Granted in Prior Years [Member] Year over year change in fair value of outstanding and unvested equity awards granted in prior years. Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual