Statements of Consolidated Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	12 Months Ended						3 Months Ended		12 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 United Air Lines Inc	Dec. 31, 2011 United Air Lines Inc	Dec. 31, 2010 United Air Lines Inc	Dec. 31, 2010 Continental Airlines Inc Successor		Dec. 31, 2012 Continental Airlines Inc Successor	Dec. 31, 2011 Continental Airlines Inc Successor	Sep. 30, 2010 Continental Airlines Inc Predecessor
Net income (loss)	$ (723)	$ 840	$ 253	$ (1,188)	$ 281	$ 399	$ (95)		$ 527	$ 569	$ 441
Fuel derivative financial instruments:
Reclassification into earnings	141	(503)	68	76	(417)	84	(16)		65	(86)	24
Change in fair value	(51)	163	168	(23)	172	101	67		(28)	(9)	(13)
Employee benefit plans:
Net change related to employee benefit plans	(730)	(464)	95	(164)	29	(148)	243		(566)	(493)	82
Investments and other	11		21	7	(3)	19	2		5	1
Tax expense on other comprehensive loss							(6)	[1]
Comprehensive income (loss) adjustments, before tax	(629)	(804)	352	(104)	(219)	56
Other comprehensive income (loss)							290		(524)	(587)	93
Total comprehensive income (loss), net	$ (1,352)	$ 36	$ 605	$ (1,292)	$ 62	$ 455	$ 195		$ 3	$ (18)	$ 534

[1] Taxes on other comprehensive income did not impact Continental's net deferred tax position due to an offsetting tax benefit on the loss from continuing operations as described in Note 8.