Changes in Goodwill by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 3,663,674us-gaap_Goodwill	$ 3,015,670us-gaap_Goodwill
Additions	418,408us-gaap_GoodwillAcquiredDuringPeriod	636,445us-gaap_GoodwillAcquiredDuringPeriod
Foreign exchange translation	(126,181)us-gaap_GoodwillTranslationAdjustments	11,559us-gaap_GoodwillTranslationAdjustments
Goodwill, Ending Balance	3,955,901us-gaap_Goodwill	3,663,674us-gaap_Goodwill
Leisure
Goodwill [Line Items]
Goodwill, Beginning Balance	3,469,023	2,822,388
Additions	418,408	636,445
Foreign exchange translation	(87,854)	10,190
Goodwill, Ending Balance	3,799,577	3,469,023
Egencia
Goodwill [Line Items]
Goodwill, Beginning Balance	194,651	193,282
Foreign exchange translation	(38,327)	1,369
Goodwill, Ending Balance	$ 156,324	$ 194,651

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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