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Reportable Business Segment Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 910,164,000 us-gaap_SalesRevenueNet | [1] | $ 1,228,444,000 us-gaap_SalesRevenueNet | [1] | $ 917,336,000 us-gaap_SalesRevenueNet | [1] | $ 855,846,000 us-gaap_SalesRevenueNet | [1] | $ 864,827,000 us-gaap_SalesRevenueNet | [2] | $ 1,167,921,000 us-gaap_SalesRevenueNet | [2] | $ 880,029,000 us-gaap_SalesRevenueNet | [2] | $ 795,741,000 us-gaap_SalesRevenueNet | [2] | $ 3,911,790,000 us-gaap_SalesRevenueNet |  | $ 3,708,518,000 us-gaap_SalesRevenueNet |  | $ 3,588,318,000 us-gaap_SalesRevenueNet |
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 148,089,000 us-gaap_DepreciationDepletionAndAmortization |  | 167,644,000 us-gaap_DepreciationDepletionAndAmortization |  | 165,015,000 us-gaap_DepreciationDepletionAndAmortization |
Rationalization charges | 9,500,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 2,500,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 900,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 1,600,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 8,400,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 1,300,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 900,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 1,400,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 14,481,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 11,987,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |  | 8,660,000 us-gaap_RestructuringSettlementAndImpairmentProvisions |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 360,853,000 us-gaap_OperatingIncomeLoss |  | 324,180,000 us-gaap_OperatingIncomeLoss |  | 325,509,000 us-gaap_OperatingIncomeLoss |
Business Combination, Acquisition Related Costs |  |  | 300,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts |  |  |  | 200,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts |  | 300,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts |  | 1,000,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts |  |  |  | 200,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts |  |  |  |  |  |  |
Segment assets | 3,222,035,000 slgn_SegmentReportingAssets |  |  |  |  |  |  |  | 3,239,540,000 slgn_SegmentReportingAssets |  |  |  |  |  |  |  | 3,222,035,000 slgn_SegmentReportingAssets |  | 3,239,540,000 slgn_SegmentReportingAssets |  | 3,226,103,000 slgn_SegmentReportingAssets |
Capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 140,429,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |  | 103,136,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |  | 119,241,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment |
Start Up Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 slgn_StartUpCosts |  |  |  |  |  |  |
Charge included for the remeasurement of net assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 slgn_ChargeForRemeasurementOfNetAssets |  |  |  |  |  |  |
Venezuela [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) | (500,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | 800,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | (2,900,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | (500,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | 2,300,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | 100,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | (1,100,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  | (4,200,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_VenezuelaMember |  |  |  |  |  |  |
Metal Containers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,369,684,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 2,341,409,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 2,293,749,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,117,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 84,871,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 87,629,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 248,704,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 236,327,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember | [3] | 231,456,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember | [4]
Segment assets | 1,555,046,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  |  |  |  |  |  |  | 1,514,823,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  |  |  |  |  |  |  | 1,555,046,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 1,514,823,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 1,742,842,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |
Capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94,396,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 73,764,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 68,737,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |
Start Up Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 slgn_StartUpCosts / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 6,400,000 slgn_StartUpCosts / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |
Closures [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 882,934,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 720,111,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 680,031,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 41,571,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 35,834,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 32,427,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75,592,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember | [5] | 63,046,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember | [3] | 73,148,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember | [4]
Segment assets | 857,375,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  |  |  |  |  |  |  | 937,506,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  |  |  |  |  |  |  | 857,375,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 937,506,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 639,598,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |
Capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,160,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 17,094,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 19,838,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |
Operating Income(Loss) Venezuela |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,100,000)slgn_OperatingIncomeLossVenezuela / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | (2,900,000)slgn_OperatingIncomeLossVenezuela / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 5,100,000 slgn_OperatingIncomeLossVenezuela / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |
Charge included for the remeasurement of net assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 slgn_ChargeForRemeasurementOfNetAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  |  |
Plastic Containers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 659,172,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 646,998,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 614,538,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,274,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 46,807,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 44,203,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 51,495,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 38,563,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 30,848,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |
Segment assets | 775,932,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  |  |  |  |  |  |  | 753,325,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  |  |  |  |  |  |  | 775,932,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 753,325,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 809,937,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |
Capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,866,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 11,769,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 30,405,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |
Corporate Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 0 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 0 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 127,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 132,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 756,000 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Rationalization charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 0 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (14,938,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | [5] | (13,756,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | [3] | (9,943,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | [4]
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 1,500,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 1,500,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Segment assets | 33,682,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  |  |  |  |  |  |  | 33,886,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  |  |  |  |  |  |  | 33,682,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 33,886,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 33,726,000 slgn_SegmentReportingAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Capital expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 509,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  | 261,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |
Facility Closings and Restructuring [Member] | Metal Containers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rationalization charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (440,000)us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 2,490,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |  | 2,446,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_MetalContainersMember |
Facility Closings and Restructuring [Member] | Closures [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rationalization charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,256,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 5,615,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |  | 2,878,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_ClosuresMember |
Facility Closings and Restructuring [Member] | Plastic Containers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rationalization charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,665,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 3,882,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |  | 3,336,000 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = slgn_PlasticContainersMember |
Facility Closings and Restructuring [Member] | Corporate Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rationalization charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 us-gaap_RestructuringSettlementAndImpairmentProvisions / us-gaap_RestructuringCostAndReserveAxis = slgn_FacilityClosingsandRestructuringMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember |  |  |  |  |
[1] | The first, second, third and fourth quarters of 2014 include rationalization charges of $1.6 million, $0.9 million, $2.5 million and $9.5 million, respectively, and (loss) income from operations in Venezuela of $(0.5) million, $(2.9) million, $0.8 million and $(0.5) million, respectively. The first quarter of 2014 includes a loss on early extinguishment of debt of $1.5 million. The first and third quarters of 2014 include costs attributable to announced acquisitions of $0.2 million and $0.3 million, respectively.
[2] | The first, second, third and fourth quarters of 2013 include rationalization charges of $1.4 million, $0.9 million, $1.3 million and $8.4 million, respectively, and (loss) income from operations in Venezuela of $(4.2) million, $(1.1) million, $0.1 million and $2.3 million, respectively. The loss from operations in Venezuela for the first quarter of 2013 includes a charge of $3.0 million for the remeasurement of net assets due to a currency devaluation. The first, third and fourth quarters of 2013 include costs attributable to announced acquisitions of $0.2 million, $1.0 million and $0.3 million, respectively. The first quarter of 2013 includes new plant start-up costs of $0.8 million.
[3] | Metal containers includes new plant start-up costs of $0.8 million. Closures includes a loss from operations in Venezuela of $2.9 million, which includes a charge of $3.0 million for the remeasurement of net assets due to a currency devaluation. Corporate includes costs attributable to announced acquisitions of $1.5 million.
[4] | Metal containers includes new plant start-up costs of $6.4 million. Closures includes income from operations in Venezuela of $5.1 million. Corporate includes costs attributable to announced acquisitions of $1.5 million.
[5] | Closures includes a loss from operations in Venezuela of $3.1 million. Corporate includes costs attributable to announced acquisitions of $0.5 million.

X
- Definition Charge for the remeasurement of net assets. + References No definition available. + Details
Name: | slgn_ChargeForRemeasurementOfNetAssets
Namespace Prefix: | slgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Operating Income(Loss) Venezuela + References No definition available. + Details
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- Definition Segment Reporting, Assets + References No definition available. + Details
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- Definition Start up Costs + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + 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 (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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