STOCKHOLDERS’ EQUITY AND EQUITY-BASED COMPENSATION - Wheels Up Stock Options Narrative (Details) - Stock options - 2021 LTIP	12 Months Ended
	Dec. 31, 2025 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Service period (in years)	3 years
Expiration period	10 years
Aggregate intrinsic value	$ 0
Weighted-average remaining contractual term, outstanding (in years)	1 year 10 months 24 days
Weighted-average remaining contractual term, exercisable (in years)	1 year 10 months 24 days