Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows From Operating Activities:
Net income/(loss)	$ 1,318	$ 280	$ (12,385)
Adjustments to reconcile net income to net cash provided by operating activities:
Restructuring charges	(46)	5	4,111
Depreciation and amortization	2,107	1,998	2,312
Deferred income taxes	591	115	(3,110)
(Gain)/loss on fair value investments	874	(38)	88
Pension, postretirement and postemployment payments (greater)/less than expense	(453)	(2,038)	898
Impairments and equity method results	20	337	2,432
Changes in certain assets and liabilities:
Receivables	(728)	(981)	1,168
Fuel inventory	(158)	(318)	354
Prepaids and other current assets	(867)	(58)	0
Profit sharing	455	108	(1,650)
Other payables, deferred revenue and accrued liabilities	1,226	1,986	240
Noncurrent liabilities	(348)	(399)	1,185
Other, net	146	77	681
Net cash provided by/(used in) operating activities	6,363	3,264	(3,793)
Property and equipment additions:
Flight equipment, including advance payments	(4,495)	(1,596)	(896)
Ground property and equipment, including technology	(1,871)	(1,651)	(1,003)
Proceeds from sale-leaseback transactions	0	0	465
Purchase of equity investments	(870)	0	(2,099)
Purchase of short-term investments	(2,704)	(12,655)	(13,400)
Redemption of short-term investments	2,804	15,036	7,608
Other, net	212	(32)	87
Net cash used in investing activities	(6,924)	(898)	(9,238)
Cash Flows From Financing Activities:
Proceeds from short-term obligations	0	0	3,261
Proceeds from long-term obligations	0	1,902	22,790
Proceeds from sale-leaseback transactions	0	0	2,306
Payments on debt and finance lease obligations	(4,475)	(5,834)	(8,559)
Repurchase of common stock	0	0	(344)
Cash dividends	0	0	(260)
Fuel card obligation	0	0	364
Other, net	(60)	80	(202)
Net cash (used in)/provided by financing activities	(4,535)	(3,852)	19,356
Net (Decrease)/Increase in Cash, Cash Equivalents and Restricted Cash	(5,096)	(1,486)	6,325
Cash, cash equivalents and restricted cash at beginning of period	8,569	10,055	3,730
Cash, cash equivalents and restricted cash at end of period	3,473	8,569	10,055
Supplemental Disclosure of Cash Paid for Interest	1,261	1,524	761
Non-Cash Transactions:
Right-of-use assets acquired under operating leases	531	2,113	1,077
Flight and ground equipment acquired under finance leases	91	1,049	381
Equity investments and other financings	330	0	280
Operating leases converted to finance leases	342	42	0
Air traffic
Changes in certain assets and liabilities:
Liabilities and deferred revenue	1,902	1,814	(572)
Loyalty program
Changes in certain assets and liabilities:
Liabilities and deferred revenue	$ 324	$ 376	$ 455