CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Revenues
Passenger, Mainline	$ 1,272	$ 927
Passenger, Regional	212	206
Total passenger revenue	1,484	1,133
Freight and mail	24	24
Other—net	241	190
Total Operating Revenues	1,749	1,347
Operating Expenses
Wages and benefits	448	336
Variable incentive pay	31	32
Aircraft fuel, including hedging gains and losses	339	167
Aircraft maintenance	87	68
Aircraft rent	65	29
Landing fees and other rentals	115	80
Contracted services	81	60
Selling expenses	81	49
Depreciation and amortization	90	88
Food and beverage service	45	31
Third-party regional carrier expense	27	23
Special items—merger-related costs	40	0
Other	134	94
Total Operating Expenses	1,583	1,057
Operating Income	166	290
Nonoperating Income (Expense)
Interest income	7	6
Interest expense	(25)	(13)
Interest capitalized	4	8
Other—net	0	1
Nonoperating Income (Expense) Total	(14)	2
Income before income tax	152	292
Income tax expense	53	108
Net Income	$ 99	$ 184
Basic Earnings Per Share (usd per share)	$ 0.80	$ 1.47
Diluted Earnings Per Share (usd per share)	$ 0.79	$ 1.46
Shares used for computation:
Basic shares (shares)	123,495	124,550
Diluted shares (shares)	124,299	125,328
Cash dividend declared per share (usd per share)	$ 0.30	$ 0.275