Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Revenue:
Operating revenue	$ 11,775	$ 10,747	$ 21,743	$ 19,848
Operating Expense:
Salaries and related costs	2,668	2,521	5,252	4,906
Aircraft fuel and related taxes	2,341	1,687	4,195	3,169
Regional carriers expense, excluding fuel	883	838	1,739	1,702
Depreciation and amortization	590	531	1,200	1,068
Contracted services	540	525	1,084	1,029
Ancillary businesses and refinery	494	296	987	588
Passenger commissions and other selling expenses	511	467	938	872
Aircraft maintenance materials and outside repairs	427	392	862	824
Landing fees and other rents	407	373	780	734
Profit sharing	400	338	583	489
Passenger service	300	284	563	518
Aircraft rent	97	86	191	170
Other	437	427	849	798
Total operating expense	10,095	8,765	19,223	16,867
Operating Income	1,680	1,982	2,520	2,981
Non-Operating Expense:
Interest expense, net	(89)	(103)	(191)	(197)
Unrealized gain/(loss) on investments, net	(238)	0	(220)	0
Miscellaneous, net	19	(48)	(19)	(104)
Total non-operating expense, net	(308)	(151)	(430)	(301)
Income Before Income Taxes	1,372	1,831	2,090	2,680
Income Tax Provision	(347)	(645)	(518)	(933)
Net Income	$ 1,025	$ 1,186	$ 1,572	$ 1,747
Basic Earnings Per Share (USD per share)	$ 1.47	$ 1.63	$ 2.25	$ 2.40
Diluted Earnings Per Share (USD per share)	1.47	1.62	2.24	2.39
Cash Dividends Declared Per Share (USD per share)	$ 0.31	$ 0.20	$ 0.61	$ 0.41
Comprehensive Income	$ 1,100	$ 1,208	$ 1,587	$ 1,834
Passenger
Operating Revenue:
Operating revenue	10,546	9,768	19,311	17,946
Cargo
Operating Revenue:
Operating revenue	223	187	425	350
Other
Operating Revenue:
Operating revenue	$ 1,006	$ 792	$ 2,007	$ 1,552