ACQUISITIONS (Pro Forma) (Details) - Fusion Packaging - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Unaudited pro forma financial information
Net Sales	$ 2,937,303	$ 2,937,218
Net Income Attributable to AptarGroup Inc.	$ 215,619	$ 247,263
Net Income per common share — basic (in dollars per share)	$ 3.35	$ 3.89
Net Income per common share — diluted (in dollars per share)	$ 3.23	$ 3.74