CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Revenues
Passenger, Mainline	$ 3,939	$ 3,774	$ 3,490
Passenger, Regional	854	805	777
Total passenger revenue	4,793	4,579	4,267
Freight and mail	108	114	113
Other - net	697	675	584
Special Revenue	0	0	192
Total Operating Revenues	5,598	5,368	5,156
Operating Expenses
Wages and benefits	1,254	1,136	1,086
Variable incentive pay	120	116	105
Aircraft fuel, including hedging gains and losses	954	1,418	1,467
Aircraft maintenance	253	229	247
Aircraft rent	105	110	119
Landing fees and other rentals	296	279	262
Contracted services	214	196	176
Selling expenses	211	199	179
Depreciation and amortization	320	294	270
Food and beverage service	113	93	84
Third-party regional carrier expense	72	58	45
Other	356	308	278
Special Item	32	(30)	0
Total Operating Expenses	4,300	4,406	4,318
Operating Income	1,298	962	838
Nonoperating income (expense)
Interest income	21	21	18
Interest expense	(42)	(48)	(56)
Interest Costs Capitalized Adjustment	34	20	21
Other - net	1	20	(5)
Nonoperating Income (Expense) Total	14	13	(22)
Income (loss) before income tax	1,312	975	816
Income tax expense	464	370	308
Net Income	$ 848	$ 605	$ 508
Basic Earnings Per Share:	$ 6.61	$ 4.47	$ 3.63
Diluted Earnings Per Share:	$ 6.56	$ 4.42	$ 3.58
Shares used for computation:
Basic	128,373	135,445	139,910
Diluted	129,372	136,801	141,878
Common Stock, Dividends, Per Share, Declared	$ 0.80	$ 0.50	$ 0.20