CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net Income	$ 237	$ 36
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	330	310
Stock-based compensation and other	73	33
Special items - fleet transition and other (noncash)	344	376
Special items - labor and related (noncash)	51	0
Changes in certain assets and liabilities:
Changes in deferred tax provision	90	0
Increase (Decrease) in Accounts Receivable	(45)	(59)
Increase (Decrease) in Contract with Customer, Liability	179	304
Increase in deferred revenue	102	123
Proceeds from Income Tax Refunds	0	260
Other - net	(258)	26
Net cash provided by operating activities	1,103	1,409
Property and equipment additions:
Aircraft and aircraft purchase deposits	(669)	(688)
Other flight equipment	(153)	(156)
Other property and equipment	(169)	(103)
Total property and equipment additions, including capitalized interest	(991)	(947)
Purchases of marketable securities	(519)	(1,670)
Sales and maturities of marketable securities	806	1,731
Other investing activities	(106)	(2)
Net cash used in investing activities	(810)	(888)
Cash flows from financing activities:
Proceeds from issuance of debt	313	0
Common stock repurchases	(70)	0
Long-term debt payments	(242)	(333)
Other financing activities	11	37
Net cash provided by (used in) financing activities	12	(296)
Net increase in cash, cash equivalents, and restricted cash	305	225
Cash, cash equivalents, and restricted cash at beginning of year	369	494
Cash, cash equivalents, and restricted cash at end of the period	674	719
Cash paid during the period for:
Interest (net of amount capitalized)	85	72
Income taxes	14	0
Non-cash transactions:
Right-of-use assets acquired through operating leases	120	419
Operating lease converted to finance lease	505	0
Noncash or Part Noncash Acquisition, Fixed Assets Acquired	179	0
Reconciliation of cash, cash equivalents, and restricted cash at end of the period
Cash and cash equivalents	647	688
Restricted cash included in Prepaid expenses, assets held-for-sale and other current assets	27	31
Total cash, cash equivalents, and restricted cash at end of the period	$ 674	$ 719