Income Taxes	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Silgan and its subsidiaries file U.S. Federal income tax returns, as well as income tax returns in various states and foreign jurisdictions. We have been accepted into the Compliance Assurance Program for the 2017 and 2018 tax years which provides for the review by the Internal Revenue Service, or IRS, of tax matters relating to our tax return prior to filing. In the next twelve months, we expect that our reserve for unrecognized tax benefits will decrease by approximately $4.0 million primarily related to tax attributes acquired from and expenses related to certain acquisitions, as we anticipate the expiration of the applicable statutes of limitation with respect to certain tax matters and resolving certain other outstanding tax matters with the IRS. In December 2017, the staff of the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118, which provides guidance for the application of GAAP as it pertains to accounting for income taxes and allows us to record provisional amounts pertaining to the enacted legislation in the United States commonly referred to as the Tax Cuts and Jobs Act, or the 2017 Tax Act, during a measurement period ending in December 2018. For the three and nine months ended September 30, 2018, we did not have any significant adjustments to our provisional amounts. Additional work is necessary to complete the analysis of open items, including our deferred tax assets and liabilities and our historical foreign earnings. Any subsequent adjustment to the provisional amounts will be recorded in current tax expense in the fourth quarter of 2018.

Income Taxes

Silgan and its subsidiaries file U.S. Federal income tax returns, as well as income tax returns in various states and foreign jurisdictions. We have been accepted into the Compliance Assurance Program for the 2017 and 2018 tax years which provides for the review by the Internal Revenue Service, or IRS, of tax matters relating to our tax return prior to filing. In the next twelve months, we expect that our reserve for unrecognized tax benefits will decrease by approximately $4.0 million primarily related to tax attributes acquired from and expenses related to certain acquisitions, as we anticipate the expiration of the applicable statutes of limitation with respect to certain tax matters and resolving certain other outstanding tax matters with the IRS.

In December 2017, the staff of the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118, which provides guidance for the application of GAAP as it pertains to accounting for income taxes and allows us to record provisional amounts pertaining to the enacted legislation in the United States commonly referred to as the Tax Cuts and Jobs Act, or the 2017 Tax Act, during a measurement period ending in December 2018. For the three and nine months ended September 30, 2018, we did not have any significant adjustments to our provisional amounts. Additional work is necessary to complete the analysis of open items, including our deferred tax assets and liabilities and our historical foreign earnings. Any subsequent adjustment to the provisional amounts will be recorded in current tax expense in the fourth quarter of 2018.