Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 760	$ 348	$ 482	$ 463
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	325	315	649	627
Impairment of long-lived assets	15	0	31	0
Unrealized mark-to-market adjustment on available for sale securities	4	0	7	0
Unrealized/realized (gain) loss on fuel derivative instruments	(20)	(17)	15	(23)
Deferred income taxes	272	(30)	174	(26)
Loss on partial extinguishment of convertible and unsecured notes	43	0	116	0
Changes in certain assets and liabilities:
Accounts and other receivables	439	(563)	105	(797)
Other assets	(1)	16	(45)	5
Accounts payable and accrued liabilities	328	989	506	923
Air traffic liability	(92)	946	793	1,546
Other liabilities	(103)	(64)	(209)	(186)
Cash collateral received from (provided to) derivative counterparties	(101)	48	284	86
Other, net	37	17	69	32
Net cash provided by operating activities	1,906	2,005	2,977	2,650
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(987)	(95)	(1,497)	(190)
Assets constructed for others	(3)	0	(6)	0
Purchases of short-term investments	(1,545)	(1,651)	(2,470)	(2,975)
Proceeds from sales of short-term and other investments	980	1,277	2,280	2,495
Net cash used in investing activities	(1,555)	(469)	(1,693)	(670)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Payroll Support Program loan and warrants	0	625	0	1,136
Proceeds from Employee stock plans	13	13	19	26
Payments of long-term debt and finance lease obligations	(53)	(43)	(146)	(109)
Payments for repurchases and conversions of convertible debt	(178)	0	(409)	0
Other, net	3	22	6	28
Net cash provided by (used in) financing activities	(215)	617	(530)	1,081
NET CHANGE IN CASH AND CASH EQUIVALENTS	136	2,153	754	3,061
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	13,098	11,971	12,480	11,063
CASH AND CASH EQUIVALENTS AT END OF PERIOD	13,234	14,124	13,234	14,124
CASH PAYMENTS FOR:
Interest, net of amount capitalized	141	150	161	167
Income taxes	7	176	11	177
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	3	12	27	230
Flight equipment acquired against supplier credit memo	0	207	0	512
Assets constructed for others	$ 0	$ (341)	$ 0	$ (309)