Condensed Consolidated Statement of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
OPERATING REVENUES:
Total operating revenues	$ 7,037	$ 6,728	$ 12,743	$ 11,422
OPERATING EXPENSES, NET:
Salaries, wages, and benefits	2,786	2,220	5,264	4,450
Fuel and oil	1,403	1,636	2,950	2,640
Maintenance materials and repairs	271	210	511	420
Landing fees and airport rentals	459	388	867	733
Depreciation and amortization	367	325	731	649
Other operating expenses	956	791	1,909	1,523
Total operating expenses, net	6,242	5,570	12,232	10,415
OPERATING INCOME	795	1,158	511	1,007
OTHER EXPENSES (INCOME):
Interest expense	65	93	130	186
Capitalized interest	(5)	(11)	(11)	(20)
Interest income	(144)	(28)	(269)	(31)
Loss on extinguishment of debt	0	43	0	116
Other (gains) losses, net	(7)	25	(21)	96
Total other expenses (income)	(91)	122	(171)	347
INCOME BEFORE INCOME TAXES	886	1,036	682	660
PROVISION FOR INCOME TAXES	203	276	158	178
NET INCOME	$ 683	$ 760	$ 524	$ 482
Net income per share, basic (in USD per share)	$ 1.15	$ 1.29	$ 0.88	$ 0.83
Net income per share, diluted (in USD per share)	$ 1.08	$ 1.20	$ 0.84	$ 0.77
COMPREHENSIVE INCOME	$ 544	$ 674	$ 238	$ 899
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	595	593	595	593
Diluted (in shares)	639	635	639	640
Passenger
OPERATING REVENUES:
Total operating revenues	$ 6,409	$ 6,119	$ 11,514	$ 10,254
Freight
OPERATING REVENUES:
Total operating revenues	47	47	87	89
Other
OPERATING REVENUES:
Total operating revenues	$ 581	$ 562	$ 1,142	$ 1,079