COMMITMENTS AND CONTINGENCIES - Narrative (Details)	Jan. 27, 2026 aircraft	Jan. 12, 2026 aircraft	Dec. 31, 2025 aircraft employee
Future Purchase Commitments
Approximate number of employees \| employee			103,000
Percentage of employees represented by unions under collective bargaining agreements			20.00%
Monroe refinery employees represented by United Steel Workers
Future Purchase Commitments
Approximate number of employees \| employee			200
Aircraft purchase commitments
Future Purchase Commitments
Aircraft purchase commitments			256
Boeing 787-10 \| Aircraft purchase commitments \| Subsequent event
Future Purchase Commitments
Aircraft purchase commitments		30
A350-1000 \| Aircraft purchase commitments
Future Purchase Commitments
Aircraft purchase commitments			20
Airbus A330-900 Aircraft \| Aircraft purchase commitments \| Subsequent event
Future Purchase Commitments
Aircraft purchase commitments	16
Airbus A350-900 Aircraft \| Aircraft purchase commitments \| Subsequent event
Future Purchase Commitments
Aircraft purchase commitments	15
Widebody Aircraft \| Aircraft purchase commitments \| Subsequent event
Future Purchase Commitments
Aircraft purchase commitments	20