v3.26.1
STOCK-BASED COMPENSATION - Schedule of Weighted-Average Assumptions Used to Estimate Fair Value of Restricted Stock Units (Details) - Performance-Based RSUs - $ / shares
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award    
Fair value per stock award (in dollars per share) $ 123.35 $ 154.20
Grant date stock price (in dollars per share) $ 123.97 $ 147.84
Assumptions:    
Aptar's stock price expected volatility 19.50% 17.70%
Expected average volatility of peer companies 34.60% 34.10%
Correlation assumption 24.30% 31.00%
Risk-free interest rate 3.79% 4.03%
Dividend yield assumption 1.55% 1.22%