Orbitz Worldwide (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary of operations for Orbitz Worldwide
Net revenue	$ 489	$ 509	$ 1,545	$ 1,570
Operating income	27	51	155	196
Interest expense, net	(71)	(74)	(215)	(223)
Provision for income taxes	(8)	(8)	(24)	(27)
Orbitz Worldwide [Member]
Summary of operations for Orbitz Worldwide
Net revenue	198	203	589	590
Operating expenses	173	180	545	548
Operating income	25	23	44	42
Interest expense, net	(9)	(10)	(28)	(30)
Income before income taxes	16	13	16	12
Provision for income taxes	(1)	(2)	(3)	(3)
Net income	$ 15	$ 11	$ 13	$ 9