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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
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Finite And Infinite Lived Intangible Assets [Line Items] |  |  |
Intangible assets with definite life, Gross Carrying Value | $ 1,199.10 us-gaap_FiniteLivedIntangibleAssetsGross | $ 1,258.10 us-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 | 621.1 us-gaap_FiniteLivedIntangibleAssetsNet | 765.8 us-gaap_FiniteLivedIntangibleAssetsNet |
Gross Carrying Value | 2,080.4 us-gaap_IntangibleAssetsGrossExcludingGoodwill | 2,139.4 us-gaap_IntangibleAssetsGrossExcludingGoodwill |
Accumulated Impairment | (801.3)see_AccumulatedImpairmentLossesIntangibleAssets | (801.3)see_AccumulatedImpairmentLossesIntangibleAssets |
Net | 872.2 us-gaap_IntangibleAssetsNetExcludingGoodwill | 1,016.9 us-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 | 881.3 see_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = see_TrademarksAndTradeNamesWithIndefiniteLifeMember | 881.3 see_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 | 251.1 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = see_TrademarksAndTradeNamesWithIndefiniteLifeMember | 251.1 us-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 | 890.80 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 961.30 us-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 | 531.1 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 641.2 us-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 | 1.30 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 0.20 us-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 | 1.1 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 0.1 us-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 | 266.40 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = see_TechnologyMember | 252.60 us-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 | 77.2 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = see_TechnologyMember | 102.4 us-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 | 40.60 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerContractsMember | 44.00 us-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 | $ 11.7 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerContractsMember | $ 22.1 us-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.

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