COMMITMENTS AND CONTINGENCIES - Employees Under Collective Bargaining Agreements Narrative (Details) $ in Millions		3 Months Ended
	Jan. 01, 2023	Mar. 31, 2023 USD ($)	Dec. 31, 2023 employee
Other Commitments [Line Items]
Approximate number of employees | employee			103,000
Percentage of employees represented by unions under collective bargaining agreements			20.00%
Collective bargaining agreement term	4 years
Employee pay rate increase	18.00%
Pilot agreement expense | $		$ 735
Adjustments to other benefit-related items | $		$ 130
Monroe refinery employees represented by United Steel Workers
Other Commitments [Line Items]
Approximate number of employees | employee			200