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Commitments and Contingencies - Additional Information (Detail) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended |  |  | 0 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2014 USD ($) | Dec. 31, 2014 USD ($) | Mar. 31, 2015 USD ($) | Jul. 03, 2014 EUR (€) | May 25, 2010 Italian Ministry of Economic Development [Member] Italy [Member] EUR (€) | Mar. 31, 2014 Cryovac Transaction [Member] USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Gain from Claims Settlement | $ 21.1 us-gaap_GainLossRelatedToLitigationSettlement |  |  |  |  | $ 21.0 us-gaap_GainLossRelatedToLitigationSettlement / us-gaap_LossContingenciesByNatureOfContingencyAxis = see_CryovacTransactionMember
Repayment of grant monies |  |  |  |  | 5 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_RegulatoryAgencyAxis = see_ItalianMinistryOfEconomicDevelopmentMember / us-gaap_StatementGeographicalAxis = country_IT |
Loss contingency liability |  |  | 12 us-gaap_LossContingencyAccrualAtCarryingValue | 10 us-gaap_LossContingencyAccrualAtCarryingValue |  |
Charges related to development grant matter |  | $ 14 us-gaap_LitigationSettlementExpense |  |  |  |

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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