STOCK-BASED COMPENSATION - Assumptions Used (Details) - Performance-Based RSUs - $ / shares	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award
Fair value per stock award (in dollars per share)	$ 145.79	$ 116.17
Grant date stock price (in dollars per share)	$ 141.00	$ 111.38
Aptar's stock price expected volatility	18.80%	20.00%
Expected average volatility of peer companies	34.80%	39.70%
Correlation assumption	30.70%	33.30%
Risk-free interest rate	4.51%	3.83%
Dividend yield assumption	1.16%	1.36%