Condensed Consolidated Statement of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING REVENUES:
Passenger	$ 4,424	$ 4,398
Freight	42	42
Other	417	386
Total operating revenues	4,883	4,826
OPERATING EXPENSES:
Salaries, wages, and benefits	1,733	1,539
Fuel and oil	922	852
Maintenance materials and repairs	243	262
Aircraft rentals	54	59
Landing fees and other rentals	313	302
Depreciation and amortization	318	290
Other operating expenses	642	578
Total operating expenses	4,225	3,882
OPERATING INCOME	658	944
OTHER EXPENSES (INCOME):
Interest Expense	29	30
Capitalized interest	(11)	(11)
Interest income	(7)	(5)
Other (gains) losses, net	94	114
Total other expenses (income)	105	128
INCOME BEFORE INCOME TAXES	553	816
PROVISION FOR INCOME TAXES	202	303
NET INCOME	$ 351	$ 513
NET INCOME PER SHARE, BASIC	$ 0.57	$ 0.80
NET INCOME PER SHARE, DILUTED	$ 0.57	$ 0.79
COMPREHENSIVE INCOME	$ 362	$ 670
BASIC WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	613	641
DILUTED WEIGHTED AVERAGE SHARES OUTSTANDING
Diluted	614	648
Cash dividends declared per common share	$ 0.100	$ 0.075