Consolidated Statement of Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING REVENUES:
Total operating revenues	$ 23,814	$ 15,790	$ 9,048
OPERATING EXPENSES, NET:
Salaries, wages, and benefits	9,376	7,743	6,811
Payroll support and voluntary Employee programs, net	0	(2,960)	(967)
Fuel and oil	5,975	3,310	1,849
Maintenance materials and repairs	852	854	750
Landing fees and airport rentals	1,508	1,456	1,240
Depreciation and amortization	1,351	1,272	1,255
Other operating expenses	3,735	2,394	1,926
Total operating expenses, net	22,797	14,069	12,864
OPERATING INCOME (LOSS)	1,017	1,721	(3,816)
OTHER EXPENSES (INCOME):
Interest expense	340	467	349
Capitalized interest	(39)	(36)	(35)
Interest income	(217)	(13)	(32)
Loss on extinguishment	193	28	0
Other (gains) losses, net	(12)	50	(158)
Total other expenses (income)	289	396	440
INCOME (LOSS) BEFORE INCOME TAXES	728	1,325	(4,256)
PROVISION (BENEFIT) FOR INCOME TAXES	189	348	(1,182)
NET INCOME (LOSS)	$ 539	$ 977	$ (3,074)
NET INCOME (LOSS) PER SHARE, BASIC (in USD per share)	$ 0.91	$ 1.65	$ (5.44)
NET INCOME (LOSS) PER SHARE, DILUTED (in USD per share)	$ 0.87	$ 1.61	$ (5.44)
Passenger
OPERATING REVENUES:
Total operating revenues	$ 21,408	$ 14,066	$ 7,665
Freight
OPERATING REVENUES:
Total operating revenues	177	187	161
Other
OPERATING REVENUES:
Total operating revenues	$ 2,229	$ 1,537	$ 1,222