STOCK-BASED COMPENSATION - Assumptions Used (Details) - Performance-Based RSUs - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award
Fair value per stock award (in dollars per share)	$ 171.63	$ 94.98	$ 134.97
Grant date stock price (in dollars per share)	$ 141.59	$ 83.93	$ 104.51
Aptar's stock price expected volatility	21.40%	23.80%	16.50%
Expected average volatility of peer companies	50.00%	48.50%	31.90%
Correlation assumption	58.10%	63.50%	37.40%
Risk-free interest rate	0.32%	0.31%	2.19%
Dividend yield assumption	1.02%	1.72%	1.30%