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Subsequent Events Subsequent Event Details (Details) | Jan. 23, 2017 USD ($) | Dec. 31, 2016 USD ($)
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Subsequent Event [Line Items] |  |
Line Of Credit Facility Additional Borrowing Capacity |  | $ 1,250,000,000
Dispensing Systems Business Pending Acquisition [Member] | Subsequent Event [Member] |  |
Subsequent Event [Line Items] |  |
Business Acquisition, Plants Acquired | 13 |
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period | $ 566,000,000 |
Payments to Acquire Businesses, Gross | 1,025,000,000 |
Line Of Credit Facility Additional Borrowing Capacity | $ 800,000,000 |

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- Definition Business Acquisition, Plants Acquired + References No definition available. + Details
Name: | slgn_BusinessAcquisitionPlantsAcquired
Namespace Prefix: | slgn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line of Credit Facility, Additional Borrowing Capacity + References No definition available. + Details
Name: | slgn_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix: | slgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |