COMMITMENTS AND CONTINGENCIES - Summary of Firm Orders (Details)	Dec. 31, 2023 aircraft
Other Commitments [Line Items]
2024	85
2025	74
2026	85
2027	90
2028	90
2029	90
2030	90
2031	90
Total	694
-7 Firm Orders
Other Commitments [Line Items]
2024	27
2025	59
2026	59
2027	19
2028	15
2029	38
2030	45
2031	45
Total	307
-8 Firm Orders
Other Commitments [Line Items]
2024	58
2025	0
2026	0
2027	46
2028	50
2029	34
2030	0
2031	0
Total	188
-7 or -8 Options
Other Commitments [Line Items]
2024	0
2025	15
2026	26
2027	25
2028	25
2029	18
2030	45
2031	45
Total	199
MAX
Other Commitments [Line Items]
Number of aircrafts to be delivered	79