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Restructuring and Relocation Activities - Components of Restructuring Accrual, Spending and Other Activity and Accrual Balance Remaining (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
FUSION [Member] |
Restructuring Cost And Reserve [Line Items] |
Accrual and accrual adjustments | $ 5.5 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringPlanAxis = see_FusionProgramMember
Restructuring accrual at December 31, 2014 | 5.5 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = see_FusionProgramMember
EQIP [Member] |
Restructuring Cost And Reserve [Line Items] |
Restructuring accrual at December 31, 2013 | 55.9 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = see_EarningsQualityImprovementProgramMember
Accrual and accrual adjustments | 47.0 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringPlanAxis = see_EarningsQualityImprovementProgramMember
Cash payments during 2014 | (58.1)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = see_EarningsQualityImprovementProgramMember
Effect of changes in foreign currency exchange rates | (2.9)us-gaap_RestructuringReserveTranslationAdjustment / us-gaap_RestructuringPlanAxis = see_EarningsQualityImprovementProgramMember
Restructuring accrual at December 31, 2014 | 41.9 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = see_EarningsQualityImprovementProgramMember
IOP [Member] |
Restructuring Cost And Reserve [Line Items] |
Restructuring accrual at December 31, 2013 | 24.5 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = see_IntegrationAndOptimizationProgramMember
Accrual and accrual adjustments | 13.2 us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringPlanAxis = see_IntegrationAndOptimizationProgramMember
Cash payments during 2014 | (22.3)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = see_IntegrationAndOptimizationProgramMember
Effect of changes in foreign currency exchange rates | (2.3)us-gaap_RestructuringReserveTranslationAdjustment / us-gaap_RestructuringPlanAxis = see_IntegrationAndOptimizationProgramMember
Restructuring accrual at December 31, 2014 | $ 13.1 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = see_IntegrationAndOptimizationProgramMember

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + 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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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867 + Details
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- Definition Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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