Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Net Cash Provided by Operating Activities
Net Cash Provided by Operating Activities	$ 5,919	$ 5,175
Property and equipment additions:
Flight equipment, including advance payments	(2,560)	(2,852)
Ground property and equipment, including technology	(1,161)	(1,314)
Purchase of short-term investments	(2,312)	(575)
Redemption of short-term investments	3,488	2,584
Acquisition of strategic investments	(152)	(153)
Other, net	84	121
Net cash used in investing activities	(2,613)	(2,189)
Cash Flows from Financing Activities:
Payments on debt and finance lease obligations	(3,710)	(4,190)
Cash dividends	(64)	0
Other, net	(36)	(40)
Net cash used in financing activities	(3,810)	(4,230)
Net Decrease in Cash, Cash Equivalents and Restricted Cash Equivalents	(504)	(1,244)
Cash, cash equivalents and restricted cash equivalents at beginning of period	3,473	8,569
Cash, cash equivalents and restricted cash equivalents at end of period	2,969	7,325
Non-Cash Transactions:
Right-of-use assets acquired under operating leases	443	372
Flight and ground equipment acquired under finance leases	37	84
Operating leases converted to finance leases	53	279
Equity investments and other financings	0	330
Current Assets:
Cash and cash equivalents	2,835	7,023
Restricted cash included in prepaid expenses and other	134	149
Noncurrent Assets:
Restricted cash included in other noncurrent assets	0	153
Total cash, cash equivalents and restricted cash equivalents	$ 2,969	$ 7,325