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Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items] |  |  |
Provisions charged from operations for the profit sharing plan and retirement savings plans | $ 50 see_ContributionsToOrProvisionsForProfitSharingPlanAndRetirementSavingsPlansChargedAgainstEarnings | $ 51 see_ContributionsToOrProvisionsForProfitSharingPlanAndRetirementSavingsPlansChargedAgainstEarnings | $ 33 see_ContributionsToOrProvisionsForProfitSharingPlanAndRetirementSavingsPlansChargedAgainstEarnings
Contribution of common stock to profit sharing plan | 1.0 see_ContributionTowardCommonStockAsPartOfContributionToProfitSharingPlan | 0.9 see_ContributionTowardCommonStockAsPartOfContributionToProfitSharingPlan | 0.9 see_ContributionTowardCommonStockAsPartOfContributionToProfitSharingPlan
Defined benefit pension plan corridor rate | 10.00%see_DefinedBenefitPlanCorridorPercentage |  |
Percentage of equity allocation, maximum | 70.00%see_PercentageOfEquityAllocationMaximum |  |
Percentage of fixed income allocation, minimum | 30.00%see_PercentageOfFixedIncomeAllocationIncludingCashMinimum |  |
Equity Security [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Equity securities, minimum | 40.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = see_EquitySecurityMember |  |
Equity securities, maximum | 50.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = see_EquitySecurityMember |  |
Fixed Income Securities [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Equity securities, minimum | 50.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_FixedIncomeSecuritiesMember |  |
Equity securities, maximum | 60.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = us-gaap_FixedIncomeSecuritiesMember |  |

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- Definition Contributions to or provisions for the profit sharing plan and retirement savings plans charged against earnings. + References No definition available. + Details
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- Definition Contribution toward common stock as part of contribution to the profit sharing plan. + References No definition available. + Details
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- Definition Defined benefit plan corridor percentage. + References No definition available. + Details
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Period Type: | duration

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- Definition Percentage of equity allocation maximum. + References No definition available. + Details
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- Definition Percentage of fixed income allocation including cash minimum. + References No definition available. + Details
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- Details
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- Definition Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920 + Details
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- Definition Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920 + Details
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- Details
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- Details
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