CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Revenues
Passenger, Mainline	$ 1,019	$ 974	$ 1,920	$ 1,828
Passenger, Regional	212	200	398	386
Total passenger revenue	1,231	1,174	2,318	2,214
Freight and mail	30	32	53	56
Other - net	176	169	335	327
Total Operating Revenues	1,437	1,375	2,706	2,597
Operating Expenses
Wages and benefits	305	281	611	553
Variable incentive pay	32	29	58	54
Aircraft fuel, including hedging gains and losses	261	360	496	718
Aircraft maintenance	52	57	115	108
Aircraft rent	26	29	52	57
Landing fees and other rentals	66	64	137	133
Contracted services	68	62	135	122
Selling expenses	54	53	107	99
Depreciation and amortization	79	73	155	143
Food and beverage service	28	23	53	44
Other	94	81	177	161
Total Operating Expenses	1,065	1,112	2,096	2,192
Operating Income	372	263	610	405
Nonoperating Income (Expense)
Interest income	6	5	11	10
Interest expense	(11)	(12)	(22)	(25)
Interest capitalized	8	4	16	9
Other - net	1	5	1	18
Nonoperating Income (Expense)	4	2	6	12
Income before income tax	376	265	616	417
Income tax expense	142	100	233	158
Net Income	$ 234	$ 165	$ 383	$ 259
Basic Earnings Per Share (usd per share)	$ 1.80	$ 1.20	$ 2.93	$ 1.88
Diluted Earnings Per Share (usd per share)	$ 1.79	$ 1.19	$ 2.91	$ 1.86
Shares used for computation:
Basic shares (shares)	129,236	137,274	130,173	137,304
Diluted shares (shares)	130,255	138,711	131,271	138,776
Cash dividend declared per share (usd per share)	$ 0.20	$ 0.125	$ 0.4	$ 0.25