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Acquisition (Notes)	3 Months Ended
Acquisition (Notes)	Mar. 31, 2018
Acquisition [Abstract]
Business Combination Disclosure [Text Block]	Acquisition On April 6, 2017, we acquired the specialty closures and dispensing systems operations of WestRock Company, now operating under the name Silgan Dispensing Systems, or SDS. During the three months ended March 31, 2018, we finalized our purchase price allocation. There were no material changes to the previously recorded fair values of assets acquired and liabilities assumed.