STOCK-BASED COMPENSATION - Schedule of Assumptions Used (Details) - Performance-Based RSUs - $ / shares	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award
Fair value per stock award (in dollars per share)	$ 154.20	$ 145.79
Grant date stock price (in dollars per share)	$ 147.84	$ 141.00
Aptar's stock price expected volatility	17.70%	18.80%
Expected average volatility of peer companies	34.10%	34.80%
Correlation assumption	31.00%	30.70%
Risk-free interest rate	4.03%	4.51%
Dividend yield assumption	1.22%	1.16%