CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net Income	$ 88	$ 98
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	254	217
Stock-based compensation and other	37	56
Special items - operating and other noncash	0	238
Changes in certain assets and liabilities:
Changes in deferred tax provision	47	(27)
Increase (Decrease) in Accounts Receivable	(55)	(55)
Increase (Decrease) in Contract with Customer, Liability	440	394
Increase in deferred revenue	38	80
Other - net	23	(223)
Net cash provided by operating activities	872	832
Property and equipment additions:
Aircraft and aircraft purchase deposits	(380)	(414)
Other flight equipment	(63)	(113)
Other property and equipment	(144)	(107)
Supplier Proceeds	162	0
Purchases of marketable securities	(163)	(389)
Sales and maturities of marketable securities	288	574
Investing activities - fleet transition	133	(29)
Other investing activities	32	(1)
Net cash used in investing activities	(135)	(479)
Cash flows from financing activities:
Proceeds from issuance of debt	279	0
Common stock repurchases	(49)	(57)
Long-term debt payments	(149)	(149)
Other financing activities	6	41
Net cash provided by (used in) financing activities	87	(165)
Net increase in cash, cash equivalents, and restricted cash	824	188
Cash, cash equivalents, and restricted cash at beginning of year	308	369
Cash, cash equivalents, and restricted cash at end of the period	1,132	557
Cash paid during the period for:
Interest (net of amount capitalized)	55	42
Income taxes	0	14
Non-cash transactions:
Right-of-use assets acquired through operating leases	34	120
Operating lease converted to finance lease	0	310
Noncash or Part Noncash Acquisition, Fixed Assets Acquired	68	134
Reconciliation of cash, cash equivalents, and restricted cash at end of the period
Cash and cash equivalents	1,115	536
Restricted cash included in Prepaid expenses, assets held-for-sale and other current assets	17	21
Total cash, cash equivalents, and restricted cash at end of the period	$ 1,132	$ 557