Condensed Consolidated Statement of Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
OPERATING REVENUE:
Operating Revenue	$ 1,793	$ 5,639	$ 7,035	$ 16,698
OPERATING EXPENSES:
Salaries, wages, and benefits	1,678	2,002	5,245	6,046
Payroll support and voluntary Employee programs, net	(149)	0	(933)	0
Fuel and oil	379	1,090	1,507	3,242
Maintenance materials and repairs	185	313	597	916
Landing fees and airport rentals	308	345	922	1,036
Depreciation and amortization	315	308	940	906
Other operating expenses	488	762	1,405	2,260
Operating Costs and Expenses	3,204	4,820	9,683	14,406
OPERATING INCOME (LOSS)	(1,411)	819	(2,648)	2,292
OTHER EXPENSES (INCOME):
Interest expense	111	30	235	90
Capitalized interest	(11)	(10)	(23)	(27)
Interest income	(4)	(23)	(30)	(70)
Other (gains) losses, net	35	3	95	8
Total other expenses (income)	131	0	277	1
INCOME (LOSS) BEFORE INCOME TAXES	(1,542)	819	(2,925)	2,291
PROVISION FOR INCOME TAXES	(385)	160	(759)	504
NET INCOME (LOSS)	$ (1,157)	$ 659	$ (2,166)	$ 1,787
NET INCOME (LOSS) PER SHARE, BASIC	$ (1.96)	$ 1.24	$ (3.89)	$ 3.30
NET INCOME (LOSS) PER SHARE, DILUTED	$ (1.96)	$ 1.23	$ (3.89)	$ 3.29
COMPREHENSIVE INCOME (LOSS)	$ (1,129)	$ 566	$ (2,207)	$ 1,704
BASIC WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	590	533	556	542
DILUTED WEIGHTED AVERAGE SHARES OUTSTANDING
Diluted	590	534	556	543
Passenger
OPERATING REVENUE:
Operating Revenue	$ 1,454	$ 5,230	$ 6,003	$ 15,462
Freight
OPERATING REVENUE:
Operating Revenue	41	42	118	129
Other
OPERATING REVENUE:
Operating Revenue	$ 298	$ 367	$ 914	$ 1,107