Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 277	$ 446	$ 759	$ 909
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	335	322	984	949
Impairment of long-lived assets	4	0	35	0
Unrealized mark-to-market adjustment on available for sale securities	0	0	7	0
Unrealized/realized (gain) loss on fuel derivative instruments	(26)	(2)	(11)	(25)
Deferred income taxes	76	67	250	42
Loss on extinguishment of debt	76	12	192	12
Changes in certain assets and liabilities:
Accounts and other receivables	58	(23)	162	(819)
Other assets	30	59	(14)	64
Accounts payable and accrued liabilities	(70)	(948)	436	(25)
Air traffic liability	(93)	(442)	700	1,103
Other liabilities	(83)	(88)	(292)	(275)
Cash collateral received from (provided to) derivative counterparties	(325)	42	(41)	128
Other, net	(25)	(20)	44	12
Net cash provided by (used in) operating activities	234	(575)	3,211	2,075
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(1,072)	(135)	(2,568)	(325)
Assets constructed for others	(7)	(3)	(14)	(3)
Purchases of short-term investments	(1,743)	(1,525)	(4,213)	(4,500)
Proceeds from sales of short-term and other investments	1,702	1,251	3,982	3,747
Net cash used in investing activities	(1,120)	(412)	(2,813)	(1,081)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Payroll Support Program loan and warrants	0	0	0	1,136
Proceeds from Employee stock plans	12	13	32	39
Payments of long-term debt and finance lease obligations	(1,679)	(67)	(1,825)	(177)
Payments for repurchases and conversions of convertible debt	(239)	(121)	(648)	(121)
Other, net	1	18	6	46
Net cash provided by (used in) financing activities	(1,905)	(157)	(2,435)	923
NET CHANGE IN CASH AND CASH EQUIVALENTS	(2,791)	(1,144)	(2,037)	1,917
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	13,234	14,124	12,480	11,063
CASH AND CASH EQUIVALENTS AT END OF PERIOD	10,443	12,980	10,443	12,980
CASH PAYMENTS FOR:
Interest, net of amount capitalized	42	22	203	188
Income taxes	8	114	19	291
SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTIONS:
Adoption of Accounting Standards Update 2020-06, Debt (See Note 3)	0	0	245	0
Right-of-use assets acquired under operating leases	14	53	42	283
Flight equipment acquired against supplier credit memo	0	0	0	512
Assets constructed for others	0	0	0	309
Remeasurement of right-of-use asset and lease liability	$ 0	$ 343	$ 0	$ 343