Orbitz Worldwide (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary of operations for Orbitz Worldwide
Net revenue	$ 548	$ 550
Operating income	69	66
Interest expense, net	(70)	(67)
Benefit from (provision for) income taxes	(11)	(8)
Orbitz Worldwide [Member]
Summary of operations for Orbitz Worldwide
Net revenue	203	190
Operating expenses	206	186
Operating income	(3)	4
Interest expense, net	(9)	(10)
Loss before income taxes	(12)	(6)
Benefit from (provision for) income taxes	158	(1)
Net income (loss)	$ 146	$ (7)