Statements of Consolidated Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating revenue:
Passenger-Mainline	$ 26,785	$ 25,997	$ 25,804
Passenger-Regional	6,977	7,125	6,779
Total passenger revenue	33,762	33,122	32,583
Cargo	938	882	1,018
Other operating revenue	4,201	4,275	3,551
Total revenue	38,901	38,279	37,152
Operating expense:
Aircraft fuel	11,675	12,345	13,138
Salaries and related costs	8,935	8,625	7,945
Regional capacity purchase	2,344	2,419	2,470
Landing fees and other rent	2,274	2,090	1,929
Aircraft maintenance materials and outside repairs	1,779	1,821	1,760
Depreciation and amortization	1,679	1,689	1,522
Distribution expenses	1,373	1,390	1,352
Aircraft rent	883	936	993
Special charges	443	520	1,323
Other operating expenses	5,143	5,195	4,681
Total operating expenses	36,528	37,030	37,113
Operating income	2,373	1,249	39
Nonoperating income (expense):
Interest expense	(735)	(783)	(835)
Interest capitalized	52	49	37
Interest income	22	21	23
Miscellaneous, net	(584)	3	12
Total other expense	(1,245)	(710)	(763)
Income (loss) before income taxes	1,128	539	(724)
Income tax expense (benefit)	(4)	(32)	(1)
Net income (loss)	1,132	571	(723)
Earnings (loss) per share, basic	$ 3.05	$ 1.64	$ (2.18)
Earnings (loss) per share, diluted	$ 2.93	$ 1.53	$ (2.18)
United Airlines, Inc.
Operating revenue:
Passenger-Mainline	26,785	25,997	25,804
Passenger-Regional	6,977	7,125	6,779
Total passenger revenue	33,762	33,122	32,583
Cargo	938	882	1,018
Other operating revenue	4,201	4,283	3,559
Total revenue	38,901	38,287	37,160
Operating expense:
Aircraft fuel	11,675	12,345	13,138
Salaries and related costs	8,935	8,625	7,945
Regional capacity purchase	2,344	2,419	2,470
Landing fees and other rent	2,274	2,090	1,929
Aircraft maintenance materials and outside repairs	1,779	1,821	1,760
Depreciation and amortization	1,679	1,689	1,522
Distribution expenses	1,373	1,390	1,352
Aircraft rent	883	936	993
Special charges	443	520	1,323
Other operating expenses	5,139	5,193	4,677
Total operating expenses	36,524	37,028	37,109
Operating income	2,377	1,259	51
Nonoperating income (expense):
Interest expense	(742)	(781)	(823)
Interest capitalized	52	49	37
Interest income	22	21	23
Miscellaneous, net	(599)	89	55
Total other expense	(1,267)	(622)	(708)
Income (loss) before income taxes	1,110	637	(657)
Income tax expense (benefit)	(4)	(17)	4
Net income (loss)	$ 1,114	$ 654	$ (661)