Statements of Consolidated Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income (loss)	$ 379	$ 6	$ 431	$ (103)
Other comprehensive income, net:
Net change related to fuel derivative financial instruments	30	171	20	71
Net change related to employee benefit plans	51	4	531	13
Net change related to investments and other	(5)	5	2	14
Comprehensive income (loss) adjustments, before tax	76	180	553	98
Total comprehensive income (loss), net	455	186	984	(5)
United Airlines, Inc.
Net income (loss)	378	(25)	500	(87)
Other comprehensive income, net:
Net change related to fuel derivative financial instruments	30	171	20	71
Net change related to employee benefit plans	51	4	531	13
Net change related to investments and other	(5)	6	3	15
Other			6
Comprehensive income (loss) adjustments, before tax	76	181	560	99
Total comprehensive income (loss), net	$ 454	$ 156	$ 1,060	$ 12