Condensed Consolidated Statement of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
OPERATING REVENUE:
Operating Revenue	$ 5,909	$ 5,742	$ 11,059	$ 10,686
OPERATING EXPENSES:
Salaries, wages, and benefits	2,068	1,927	4,043	3,748
Fuel and oil	1,136	1,202	2,152	2,220
Maintenance materials and repairs	310	274	603	531
Landing fees and airport rentals	357	344	691	675
Depreciation and amortization	302	292	598	569
Other operating expenses	768	731	1,499	1,355
Total operating expenses	4,941	4,770	9,586	9,098
OPERATING INCOME	968	972	1,473	1,588
OTHER EXPENSES (INCOME):
Interest Expense	31	33	61	66
Capitalized interest	(9)	(10)	(17)	(20)
Interest income	(24)	(15)	(47)	(27)
Other (gains) losses, net	2	(4)	4	(8)
Total other expenses (income)	0	12	1	27
INCOME BEFORE INCOME TAXES	968	960	1,472	1,561
PROVISION FOR INCOME TAXES	227	227	344	366
NET INCOME	$ 741	$ 733	$ 1,128	$ 1,195
NET INCOME PER SHARE, BASIC	$ 1.37	$ 1.27	$ 2.06	$ 2.05
NET INCOME PER SHARE, DILUTED	$ 1.37	$ 1.27	$ 2.06	$ 2.05
COMPREHENSIVE INCOME	$ 675	$ 953	$ 1,138	$ 1,499
BASIC WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	542	578	547	582
DILUTED WEIGHTED AVERAGE SHARES OUTSTANDING
Diluted	542	579	547	583
Passenger
OPERATING REVENUE:
Operating Revenue	$ 5,487	$ 5,358	$ 10,231	$ 9,943
Freight
OPERATING REVENUE:
Operating Revenue	44	44	87	87
Other
OPERATING REVENUE:
Operating Revenue	$ 378	$ 340	$ 741	$ 656