DERIVATIVE INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Fair values of derivative instruments on the consolidated balance sheet (in millions):

	2023		2022
Fuel hedge contracts (not designated as hedges)
Other current assets	$	10	$	33
Other assets	1		11
Interest rate swaps (designated as hedges)
Other current assets	6		8
Other noncurrent assets	2		7
(Losses)/gains in accumulated other comprehensive loss (AOCL)	(7)		23

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]

Pretax effect of derivative instruments on earnings and AOCL (in millions):

	2023		2022		2021
Fuel hedge contracts (not designated as hedges)
(Losses)/gains recognized in Aircraft fuel	$	(62)	$	93	$	104
Interest rate swaps (designated as hedges)
(Losses)/gains recognized in other comprehensive income (OCI)	(7)		23		17