Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (231)	$ (159)
Adjustments to reconcile net loss to cash provided by (used in) operating activities:
Depreciation and amortization	408	365
Unrealized mark-to-market adjustment on available for sale securities	0	(4)
Unrealized/realized loss on fuel derivative instruments	1	0
Deferred income taxes	(68)	(52)
Changes in certain assets and liabilities:
Accounts and other receivables	(308)	(232)
Other assets	(14)	50
Accounts payable and accrued liabilities	(897)	(72)
Air traffic liability	1,115	947
Other liabilities	(71)	(47)
Cash collateral received from (provided to) derivative counterparties	0	(30)
Other, net	(39)	(60)
Net cash provided by (used in) operating activities	(104)	706
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(583)	(1,046)
Assets constructed for others	(9)	(6)
Purchases of short-term investments	(1,678)	(2,204)
Proceeds from sales of short-term and other investments	1,720	1,679
Other, net	(35)	0
Net cash used in investing activities	(585)	(1,577)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Employee stock plans	15	9
Payments of long-term debt and finance lease obligations	(8)	(59)
Payments of cash dividends	(215)	(214)
Other, net	(24)	2
Net cash used in financing activities	(232)	(262)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(921)	(1,133)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	9,288	9,492
CASH AND CASH EQUIVALENTS AT END OF PERIOD	8,367	8,359
CASH PAYMENTS FOR:
Interest, net of amount capitalized	18	19
Income taxes	3	2
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTIONS:
Right-of-use assets acquired under operating leases	$ 16	$ 47