Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net Cash (Used In)/Provided by Operating Activities
Net Cash (Used In)/Provided by Operating Activities	$ (2,507)	$ 7,455
Property and equipment additions:
Flight equipment, including advance payments	(594)	(2,774)
Ground property and equipment, including technology	(757)	(1,090)
Proceeds from sale-leaseback transactions	465	0
Purchase of short-term investments	(8,700)	0
Redemption of short-term investments	3,654	206
Acquisition of strategic investments	(2,099)	(170)
Payments To Fund Loans To Others	(235)	0
Other, net	76	45
Net cash used in investing activities	(8,190)	(3,783)
Cash Flows from Financing Activities:
Proceeds from short-term obligations	3,261	1,750
Proceeds from long-term obligations	22,481	500
Proceeds from sale-leaseback transactions	2,306	0
Payments on debt and finance lease obligations	(2,318)	(2,805)
Repurchase of common stock	(344)	(1,802)
Cash dividends	(260)	(721)
Fuel card obligation	364
Fuel card obligation		(636)
Other, net	(177)	(8)
Net cash provided by/(used in) financing activities	25,313	(3,722)
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash Equivalents	14,616	(50)
Cash, cash equivalents and restricted cash equivalents at beginning of period	3,730	2,748
Cash, cash equivalents and restricted cash equivalents at end of period	18,346	2,698
Non-Cash Transactions:
Right-of-use assets acquired under operating leases	1,062	459
Flight and ground equipment acquired under finance leases	347	619
Operating leases converted to finance leases	0	189
Noncurrent Assets:
Total cash, cash equivalents and restricted cash equivalents	$ 18,346	$ 2,698