ACQUISITIONS (Details) - USD ($) $ in Thousands				12 Months Ended
	Oct. 01, 2021	Sep. 30, 2021	Sep. 20, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired				$ 0	$ 2,504	$ 745,670
Goodwill				$ 2,018,241	$ 1,984,952	$ 2,038,408
Silgan Specialty Packaging
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired			$ 484,900
Goodwill			209,400
Silgan Specialty Packaging | Customer Relationships
Business Acquisition [Line Items]
Customer relationship intangible asset			169,000
Silgan Specialty Packaging | Technology-Based Intangible Assets
Business Acquisition [Line Items]
Customer relationship intangible asset			$ 3,400
Unicep Packaging LLC
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired		$ 237,100
Goodwill		142,600
Unicep Packaging LLC | Customer Relationships
Business Acquisition [Line Items]
Customer relationship intangible asset		74,000
Unicep Packaging LLC | Technology-Based Intangible Assets
Business Acquisition [Line Items]
Customer relationship intangible asset		4,000
Unicep Packaging LLC | Trade names
Business Acquisition [Line Items]
Customer relationship intangible asset		$ 3,600
Easytech Closures S.p.A.
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired	$ 28,400
Goodwill	12,900
Easytech Closures S.p.A. | Customer Relationships
Business Acquisition [Line Items]
Customer relationship intangible asset	$ 3,100