Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Cash Provided by Operating Activities
Net Cash Provided by Operating Activities	$ 1,771	$ 691
Property and equipment additions:
Flight equipment, including advance payments	(1,276)	(132)
Ground property and equipment, including technology	(490)	(306)
Purchase of short-term investments	(226)	(3,161)
Redemption of short-term investments	1,346	3,371
Purchase of equity investments	(100)	0
Other, net	(3)	168
Net cash used in investing activities	(749)	(60)
Cash Flows from Financing Activities:
Proceeds from long-term obligations	0	924
Payments on debt and finance lease obligations	(1,443)	(1,775)
Other, net	(13)	61
Net cash used in financing activities	(1,456)	(790)
Net Decrease in Cash, Cash Equivalents and Restricted Cash Equivalents	(434)	(159)
Cash, cash equivalents and restricted cash equivalents at beginning of period	8,569	10,055
Cash, cash equivalents and restricted cash equivalents at end of period	8,135	9,896
Non-Cash Transactions:
Flight and ground equipment acquired under finance leases	42	473
Right-of-use assets acquired under operating leases	359	20
Equity investments and other financings	330	200
Current Assets:
Cash and cash equivalents	7,705	8,460
Restricted cash included in prepaid expenses and other	170	213
Noncurrent Assets:
Restricted Cash and Cash Equivalents, Noncurrent	260	1,223
Total cash, cash equivalents and restricted cash equivalents	$ 8,135	$ 9,896