Condensed Consolidated Statement of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING REVENUES:
Total operating revenues	$ 5,706	$ 4,694
OPERATING EXPENSES, NET:
Salaries, wages, and benefits	2,478	2,229
Fuel and oil	1,547	1,004
Maintenance materials and repairs	240	211
Landing fees and airport rentals	408	346
Depreciation and amortization	365	324
Other operating expenses	952	731
Total operating expenses, net	5,990	4,845
OPERATING LOSS	(284)	(151)
OTHER EXPENSES (INCOME):
Interest expense	66	93
Capitalized interest	(6)	(9)
Interest income	(125)	(3)
Loss on extinguishment of debt	0	72
Other (gains) losses, net	(14)	72
Total other expenses (income)	(79)	225
LOSS BEFORE INCOME TAXES	(205)	(376)
BENEFIT FOR INCOME TAXES	(46)	(98)
NET LOSS	$ (159)	$ (278)
Net income per share, basic (in USD per share)	$ (0.27)	$ (0.47)
Net income per share, diluted (in USD per share)	$ (0.27)	$ (0.47)
COMPREHENSIVE INCOME (LOSS)	$ (306)	$ 225
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (in shares)	594	592
Diluted (in shares)	594	592
Passenger
OPERATING REVENUES:
Total operating revenues	$ 5,105	$ 4,135
Freight
OPERATING REVENUES:
Total operating revenues	41	42
Other
OPERATING REVENUES:
Total operating revenues	$ 560	$ 517