Changes in Goodwill by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 2,877,301	$ 2,864,664
Additions	131,414	22,522
Foreign exchange translation	6,955	(9,885)
Goodwill, Ending Balance	3,015,670	2,877,301
Leisure
Goodwill [Line Items]
Goodwill, Beginning Balance	2,814,486	2,822,150
Additions	2,684
Foreign exchange translation	5,218	(7,664)
Goodwill, Ending Balance	2,822,388	2,814,486
Egencia
Goodwill [Line Items]
Goodwill, Beginning Balance	62,815	42,514
Additions	128,730	22,522
Foreign exchange translation	1,737	(2,221)
Goodwill, Ending Balance	$ 193,282	$ 62,815