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Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Funded Status for Pension Plans (Detail) (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items] |  |
Other | $ 2.1 | $ 33.5
French Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Other |  | $ 27.3

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- Definition Defined benefit plan other income expense benefit obligation. + References No definition available. + Details
Name: | see_DefinedBenefitPlanOtherIncomeExpenseBenefitObligation
Namespace Prefix: | see_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=see_FrenchPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |