LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt obligations on the consolidated balance sheet (in millions):

	2023			2022
Fixed-rate notes payable due through 2029	$	80		$	113
Fixed-rate PSP note payable due through 2031	600			600
Fixed-rate EETC payable due through 2025 & 2027	835			947
Variable-rate notes payable due through 2035	971			514
Less debt issuance costs	(15)			(15)
Total debt	2,471			2,159
Less current portion(a)	289			276
Long-term debt, less current portion	$	2,182		$	1,883
Weighted-average fixed-interest rate	3.4		%	3.5		%
Weighted-average variable-interest rate	6.8		%	5.8		%

Schedule of Maturities of Long-term Debt [Table Text Block]

At December 31, 2023, long-term debt principal payments for the next five years and thereafter are as follows (in millions):

	Total
2024	$	294
2025	351
2026	307
2027	630
2028	114
Thereafter	790
Total Principal Payments	$	2,486