Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Cash Provided by Operating Activities
Net Cash Provided by Operating Activities	$ 358	$ 1,942
Property and equipment additions:
Flight equipment, including advance payments	(629)	(1,059)
Ground property and equipment, including technology	(308)	(301)
Redemption of short-term investments	0	206
Acquisition of strategic investments	(2,099)	0
Other, net	65	58
Net cash used in investing activities	(2,971)	(1,096)
Cash Flows from Financing Activities:
Payments on debt and finance lease obligations	(1,238)	(1,285)
Repurchase of common stock	(344)	(1,325)
Cash dividends	(260)	(233)
Proceeds from short-term obligations	2,882	1,750
Proceeds from long-term obligations	3,962	500
Fuel card obligation	364
Fuel card obligation		(9)
Other, net	(22)	(7)
Net cash provided by/(used in) financing activities	5,344	(609)
Net Increase in Cash, Cash Equivalents and Restricted Cash Equivalents	2,731	237
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	6,461	2,985
Non-Cash Transactions:
Flight and ground equipment acquired under finance leases	184	3
Right-of-use assets acquired under operating leases	55	274
Noncurrent Assets:
Total cash, cash equivalents and restricted cash equivalents	$ 6,461	$ 2,985