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Restructuring Activities (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Dec. 31, 2011
Restructuring Charges [Abstract] |
Restructuring Charges | $ 52.9

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- Definition Restructuring charges and associated cost. + References No definition available. + Details
Name: | see_RestructuringChargesAndAssociatedCost
Namespace Prefix: | see_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RestructuringChargesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration