Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating Revenue:
Operating revenue	$ 11,953	$ 11,061	$ 33,696	$ 30,910
Operating Expense:
Salaries and related costs	2,753	2,619	8,004	7,525
Aircraft fuel and related taxes	2,498	1,785	6,693	4,954
Regional carriers expense, excluding fuel	903	887	2,643	2,589
Depreciation and amortization	580	571	1,780	1,639
Contracted services	562	543	1,646	1,572
Passenger commissions and other selling expenses	535	499	1,473	1,371
Ancillary businesses and refinery	410	387	1,396	975
Aircraft maintenance materials and outside repairs	371	390	1,233	1,214
Landing fees and other rents	421	392	1,201	1,126
Profit sharing	395	314	978	803
Passenger service	329	331	892	849
Aircraft rent	99	89	291	258
Other	455	431	1,305	1,230
Total operating expense	10,311	9,238	29,535	26,105
Operating Income	1,642	1,823	4,161	4,805
Non-Operating Income/(Expense):
Interest expense, net	(84)	(100)	(274)	(297)
Unrealized gain/(loss) on investments, net	50	0	(171)	0
Miscellaneous, net	66	53	48	(51)
Total non-operating income/(expense), net	32	(47)	(397)	(348)
Income Before Income Taxes	1,674	1,776	3,764	4,457
Income Tax Provision	(362)	(617)	(880)	(1,550)
Net Income	$ 1,312	$ 1,159	$ 2,884	$ 2,907
Basic Earnings Per Share (USD per share)	$ 1.91	$ 1.62	$ 4.15	$ 4.01
Diluted Earnings Per Share (USD per share)	1.91	1.61	4.14	4.00
Cash Dividends Declared Per Share (USD per share)	$ 0.35	$ 0.31	$ 0.96	$ 0.71
Comprehensive Income	$ 1,383	$ 1,233	$ 2,970	$ 3,067
Passenger
Operating Revenue:
Operating revenue	10,796	9,979	30,107	27,925
Cargo
Operating Revenue:
Operating revenue	226	191	651	542
Other
Operating Revenue:
Operating revenue	$ 931	$ 891	$ 2,938	$ 2,443