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Goodwill and Identifiable Intangible Assets - Summarize of Identifiable Intangible Assets with Definite and Indefinite Useful Lives (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Finite And Infinite Lived Intangible Assets [Line Items]    
Intangible assets with definite life, Gross Carrying Value $ 1,199.10us-gaap_FiniteLivedIntangibleAssetsGross $ 1,258.10us-gaap_FiniteLivedIntangibleAssetsGross
Intangible assets with definite life, Accumulated Amortization (406.90)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (321.20)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible assets with definite life, Accumulated Impairment (171.1)see_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss (171.1)see_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
Intangible assets with definite life, Net 621.1us-gaap_FiniteLivedIntangibleAssetsNet 765.8us-gaap_FiniteLivedIntangibleAssetsNet
Gross Carrying Value 2,080.4us-gaap_IntangibleAssetsGrossExcludingGoodwill 2,139.4us-gaap_IntangibleAssetsGrossExcludingGoodwill
Accumulated Impairment (801.3)see_AccumulatedImpairmentLossesIntangibleAssets (801.3)see_AccumulatedImpairmentLossesIntangibleAssets
Net 872.2us-gaap_IntangibleAssetsNetExcludingGoodwill 1,016.9us-gaap_IntangibleAssetsNetExcludingGoodwill [1]
Trademarks and trade names with indefinite lives [Member]    
Finite And Infinite Lived Intangible Assets [Line Items]    
Intangible assets with indefinite life, Gross Carrying Value 881.3see_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= see_TrademarksAndTradeNamesWithIndefiniteLifeMember		 881.3see_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= see_TrademarksAndTradeNamesWithIndefiniteLifeMember
Intangible assets with indefinite life, Accumulated Impairment (630.2)see_IndefiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= see_TrademarksAndTradeNamesWithIndefiniteLifeMember		 (630.2)see_IndefiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= see_TrademarksAndTradeNamesWithIndefiniteLifeMember
Intangible assets with indefinite life, Net 251.1us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= see_TrademarksAndTradeNamesWithIndefiniteLifeMember		 251.1us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= see_TrademarksAndTradeNamesWithIndefiniteLifeMember
Customer relationships [Member]    
Finite And Infinite Lived Intangible Assets [Line Items]    
Intangible assets with definite life, Gross Carrying Value 890.80us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 961.30us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Intangible assets with definite life, Accumulated Amortization (210.80)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 (171.20)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Intangible assets with definite life, Accumulated Impairment (148.9)see_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 (148.9)see_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Intangible assets with definite life, Net 531.1us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		 641.2us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Trademarks and trade names [Member]    
Finite And Infinite Lived Intangible Assets [Line Items]    
Intangible assets with definite life, Gross Carrying Value 1.30us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember		 0.20us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember
Intangible assets with definite life, Accumulated Amortization (0.20)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember		 (0.10)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember
Intangible assets with definite life, Net 1.1us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember		 0.1us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TrademarksAndTradeNamesMember
Technology    
Finite And Infinite Lived Intangible Assets [Line Items]    
Intangible assets with definite life, Gross Carrying Value 266.40us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember		 252.60us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember
Intangible assets with definite life, Accumulated Amortization (167.00)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember		 (128.00)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember
Intangible assets with definite life, Accumulated Impairment (22.2)see_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember		 (22.2)see_FiniteLivedIntangibleAssetsAccumulatedImpairmentLoss
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember
Intangible assets with definite life, Net 77.2us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember		 102.4us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= see_TechnologyMember
Customer Contracts    
Finite And Infinite Lived Intangible Assets [Line Items]    
Intangible assets with definite life, Gross Carrying Value 40.60us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember		 44.00us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember
Intangible assets with definite life, Accumulated Amortization (28.90)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember		 (21.90)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember
Intangible assets with definite life, Net $ 11.7us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember		 $ 22.1us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember
[1] Certain amounts have been revised to reflect the retrospective application of the Company’s change in inventory costing method for certain U.S. inventories to the FIFO method from the LIFO method. Refer to Note 2, “Summary of Significant Accounting Policies - Inventories,” of the notes to consolidated financial statements for further details surrounding this accounting policy change.