Condensed Consolidated Statement of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
OPERATING REVENUES:
Total operating revenues	$ 6,525	$ 6,220	$ 19,268	$ 17,642
OPERATING EXPENSES:
Salaries, wages, and benefits	2,728	2,322	7,991	6,771
Fuel and oil	1,564	1,750	4,514	4,390
Maintenance materials and repairs	326	204	836	624
Landing fees and airport rentals	457	395	1,324	1,128
Depreciation and amortization	375	335	1,107	984
Other operating expenses	958	819	2,868	2,343
Total operating expenses	6,408	5,825	18,640	16,240
OPERATING INCOME	117	395	628	1,402
OTHER EXPENSES (INCOME):
Interest expense	63	86	193	272
Capitalized interest	(4)	(11)	(15)	(31)
Interest income	(156)	(70)	(425)	(101)
Loss on extinguishment of debt	0	76	0	192
Other (gains) losses, net	(23)	(39)	(44)	57
Total other expenses (income)	(120)	42	(291)	389
INCOME BEFORE INCOME TAXES	237	353	919	1,013
PROVISION FOR INCOME TAXES	44	76	202	254
NET INCOME	$ 193	$ 277	$ 717	$ 759
Net income per share, basic (in USD per share)	$ 0.32	$ 0.47	$ 1.20	$ 1.28
Net income per share, diluted (in USD per share)	$ 0.31	$ 0.44	$ 1.15	$ 1.21
COMPREHENSIVE INCOME (LOSS)	$ 336	$ (223)	$ 574	$ 676
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	596	593	595	593
Diluted (in shares)	640	639	639	643
Passenger
OPERATING REVENUES:
Total operating revenues	$ 5,912	$ 5,613	$ 17,426	$ 15,867
Freight
OPERATING REVENUES:
Total operating revenues	44	44	131	133
Other
OPERATING REVENUES:
Total operating revenues	$ 569	$ 563	$ 1,711	$ 1,642