STOCK-BASED COMPENSATION - Assumptions Used (Details) - Performance-Based RSUs - $ / shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award
Fair value per stock award (in dollars per share)	$ 116.17	$ 141.95
Grant date stock price (in dollars per share)	$ 111.38	$ 114.52
Aptar's stock price expected volatility	20.00%	20.20%
Expected average volatility of peer companies	39.70%	41.70%
Correlation assumption	33.30%	41.20%
Risk-free interest rate	3.83%	2.04%
Dividend yield assumption	1.36%	1.33%