Significant Accounting Policies	6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Basis of Presentation. The accompanying unaudited condensed consolidated financial statements of Silgan Holdings Inc., or Silgan, have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying financial statements include all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation. The results of operations for any interim period are not necessarily indicative of the results of operations for the full year. The Condensed Consolidated Balance Sheet at December 31, 2016 has been derived from our audited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. Deferred income taxes as of December 31, 2016 and June 30, 2016 previously included in other liabilities have been presented as a separate line item on the Condensed Consolidated Balance Sheet to conform to current period presentation. You should read the accompanying condensed consolidated financial statements in conjunction with our consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016. Stock Split. On May 3, 2017, our Board of Directors declared a two-for-one stock split of our issued common stock. The stock split was effected on May 26, 2017 in the form of a stock dividend. Stockholders of record at the close of business on May 15, 2017 were issued one additional share of common stock for each share of common stock owned on that date. Information pertaining to the number of shares outstanding, per share amounts and stock compensation has been retroactively adjusted in the accompanying financial statements and related footnotes to reflect this stock split for all periods presented, except for the Condensed Consolidated Balance Sheets and Statements of Stockholders’ Equity. Stockholders’ equity reflects the stock split by reclassifying from paid-in capital to common stock an amount equal to the par value of the additional shares issued as a result of the stock split. Recently Issued Accounting Pronouncements. In May 2014, the Financial Accounting Standards Board, or FASB, issued an accounting standards update, or ASU, that amends the guidance for revenue recognition. This amendment contains principles that will require an entity to recognize revenue to depict the transfer of goods and services to customers at an amount that an entity expects to be entitled to in exchange for those goods or services. This amendment permits the use of one of two retrospective transition methods. We will adopt this amendment on January 1, 2018, and we have not yet selected a transition method. The adoption of this amendment may require us to accelerate the recognition of revenue as compared to the current standards for certain customers in cases where we produce products unique to those customers and for which we have an enforceable right of payment for production completed to date. We will continue to assess the impact of this amendment on our financial position, results of operations and cash flows. In February 2016, the FASB issued an ASU that amends existing guidance for certain leases by lessees. This amendment will require an entity to recognize assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and to disclose additional quantitative and qualitative information about leasing arrangements. In addition, this amendment clarifies the presentation requirements of the effects of leases in the statement of income and statement of cash flows. This amendment will be effective for us on January 1, 2019. Early adoption is permitted. This amendment is required to be adopted using a modified retrospective approach. We are currently evaluating the impact of this amendment on our financial position, results of operations and cash flows. In August 2016, the FASB issued an ASU that provides guidance for cash flow classification for certain cash receipts and cash payments to address diversity in practice with respect to whether items are classified on the statement of cash flows as either operating, investing or financing activities. This amendment will be effective for us on January 1, 2018. Early adoption is permitted. This amendment is required to be adopted using a retrospective approach. We are currently evaluating the impact of this amendment on our statement of cash flows. In January 2017, the FASB issued an ASU that provides guidance to simplify the test for goodwill impairment. This guidance eliminates the requirement to assign the fair value of a reporting unit to each of its assets and liabilities to quantify a goodwill impairment charge. Under this amended guidance, the goodwill impairment charge to be recognized will be determined based on comparing the carrying value of the reporting unit to its fair value. This amendment will be effective for us on January 1, 2020. Early adoption is permitted, and we plan to adopt this amendment when we perform our first goodwill impairment test after January 1, 2017. This amendment is required to be adopted prospectively and is not expected to have a material impact on our financial position, results of operations or cash flows. In March 2017, the FASB issued an ASU that amends the presentation of net periodic pension cost and net periodic postretirement benefit cost. This amendment will require an entity to disaggregate the service cost component from the other components of net periodic benefit cost, to report the service cost component in the same line item as other compensation costs and to report the other components of net periodic benefit cost (which include interest cost, expected return on plan assets, amortization of prior service cost or credit and actuarial gains and losses) separately and as a line item below operating income on our statement of income. In addition, capitalization of net periodic benefit cost in assets will be limited to the service cost component. This amendment will be effective for us on January 1, 2018. Early adoption is permitted. This amendment is required to be adopted (i) retrospectively with respect to the disaggregation of the service cost component from the other components of net periodic benefit cost and the separate reporting of the other components of net periodic benefit cost outside of operating income and (ii) prospectively with respect to the capitalization in assets of the service cost component. We are currently evaluating the impact of this amendment on our financial position, results of operations and cash flows.

Significant Accounting Policies

Basis of Presentation. The accompanying unaudited condensed consolidated financial statements of Silgan Holdings Inc., or Silgan, have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying financial statements include all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation. The results of operations for any interim period are not necessarily indicative of the results of operations for the full year.

The Condensed Consolidated Balance Sheet at December 31, 2016 has been derived from our audited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements.

Deferred income taxes as of December 31, 2016 and June 30, 2016 previously included in other liabilities have been presented as a separate line item on the Condensed Consolidated Balance Sheet to conform to current period presentation.

You should read the accompanying condensed consolidated financial statements in conjunction with our consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016.

Stock Split. On May 3, 2017, our Board of Directors declared a two-for-one stock split of our issued common stock. The stock split was effected on May 26, 2017 in the form of a stock dividend. Stockholders of record at the close of business on May 15, 2017 were issued one additional share of common stock for each share of common stock owned on that date. Information pertaining to the number of shares outstanding, per share amounts and stock compensation has been retroactively adjusted in the accompanying financial statements and related footnotes to reflect this stock split for all periods presented, except for the Condensed Consolidated Balance Sheets and Statements of Stockholders’ Equity. Stockholders’ equity reflects the stock split by reclassifying from paid-in capital to common stock an amount equal to the par value of the additional shares issued as a result of the stock split.

Recently Issued Accounting Pronouncements. In May 2014, the Financial Accounting Standards Board, or FASB, issued an accounting standards update, or ASU, that amends the guidance for revenue recognition. This amendment contains principles that will require an entity to recognize revenue to depict the transfer of goods and services to customers at an amount that an entity expects to be entitled to in exchange for those goods or services. This amendment permits the use of one of two retrospective transition methods. We will adopt this amendment on January 1, 2018, and we have not yet selected a transition method. The adoption of this amendment may require us to accelerate the recognition of revenue as compared to the current standards for certain customers in cases where we produce products unique to those customers and for which we have an enforceable right of payment for production completed to date. We will continue to assess the impact of this amendment on our financial position, results of operations and cash flows.

In February 2016, the FASB issued an ASU that amends existing guidance for certain leases by lessees. This amendment will require an entity to recognize assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and to disclose additional quantitative and qualitative information about leasing arrangements. In addition, this amendment clarifies the presentation requirements of the effects of leases in the statement of income and statement of cash flows. This amendment will be effective for us on January 1, 2019. Early adoption is permitted. This amendment is required to be adopted using a modified retrospective approach. We are currently evaluating the impact of this amendment on our financial position, results of operations and cash flows.

In August 2016, the FASB issued an ASU that provides guidance for cash flow classification for certain cash receipts and cash payments to address diversity in practice with respect to whether items are classified on the statement of cash flows as either operating, investing or financing activities. This amendment will be effective for us on January 1, 2018. Early adoption is permitted. This amendment is required to be adopted using a retrospective approach. We are currently evaluating the impact of this amendment on our statement of cash flows.

In January 2017, the FASB issued an ASU that provides guidance to simplify the test for goodwill impairment. This guidance eliminates the requirement to assign the fair value of a reporting unit to each of its assets and liabilities to quantify a goodwill impairment charge. Under this amended guidance, the goodwill impairment charge to be recognized will be determined based on comparing the carrying value of the reporting unit to its fair value. This amendment will be effective for us on January 1, 2020. Early adoption is permitted, and we plan to adopt this amendment when we perform our first goodwill impairment test after January 1, 2017. This amendment is required to be adopted prospectively and is not expected to have a material impact on our financial position, results of operations or cash flows.

In March 2017, the FASB issued an ASU that amends the presentation of net periodic pension cost and net periodic postretirement benefit cost. This amendment will require an entity to disaggregate the service cost component from the other components of net periodic benefit cost, to report the service cost component in the same line item as other compensation costs and to report the other components of net periodic benefit cost (which include interest cost, expected return on plan assets, amortization of prior service cost or credit and actuarial gains and losses) separately and as a line item below operating income on our statement of income. In addition, capitalization of net periodic benefit cost in assets will be limited to the service cost component. This amendment will be effective for us on January 1, 2018. Early adoption is permitted. This amendment is required to be adopted (i) retrospectively with respect to the disaggregation of the service cost component from the other components of net periodic benefit cost and the separate reporting of the other components of net periodic benefit cost outside of operating income and (ii) prospectively with respect to the capitalization in assets of the service cost component. We are currently evaluating the impact of this amendment on our financial position, results of operations and cash flows.