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Stockholders' Equity - Total Share-based Incentive Compensation Expense (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | $ 54.1 us-gaap_ShareBasedCompensation | $ 24.1 us-gaap_ShareBasedCompensation | [1] | $ 16.9 us-gaap_ShareBasedCompensation | [1]
Associated tax benefits recognized | 15.7 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 7.8 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense |  | 6.2 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense |
2014 Special PSU Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 11.8 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandFourteenSpecialPsuAwardsMember |  |  |  |
2014 Three-year PSU Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 6.8 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandFourteenThreeYearPsuAwardsMember |  |  |  |
2013 Three-year PSU Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 8.2 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandThirteenThreeYearPsuAwardsMember | 4.4 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandThirteenThreeYearPsuAwardsMember |  |  |
2012 Three-year PSU Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 1.8 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTwelveThreeYearPsuAwardsMember | 2.4 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTwelveThreeYearPsuAwardsMember |  | 1.9 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTwelveThreeYearPsuAwardsMember |
2011 Three-year PSU Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense |  | (1.2)us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandElevenThreeYearPsuAwardsMember |  | 1.7 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandElevenThreeYearPsuAwardsMember |
2010 Three-year PSU Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense |  | 0.1 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTenThreeYearPsuAwardsMember |  | 0.9 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTenThreeYearPsuAwardsMember |
2013 WVH Incentive Compensation [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 1.3 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandThirteenWvhIncentiveCompensationMember | 2.5 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandThirteenWvhIncentiveCompensationMember |  |  |
2012 CEO Incentive Compensation [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 0.4 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTwelvePresidentAndCooFourYearIncentiveCompensationMember | 0.6 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTwelvePresidentAndCooFourYearIncentiveCompensationMember |  | 0.2 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_TwoThousandTwelvePresidentAndCooFourYearIncentiveCompensationMember |
SLO Awards [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | 4.6 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_SloAwardsMember | 2.8 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_SloAwardsMember |  | 0.7 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_SloAwardsMember |
Other long-term share based incentive compensation programs [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Total share-based incentive compensation expense | $ 19.2 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_OtherLongTermShareBasedIncentiveCompensationProgramsMember | $ 12.5 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_OtherLongTermShareBasedIncentiveCompensationProgramsMember |  | $ 11.5 us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = see_OtherLongTermShareBasedIncentiveCompensationProgramsMember |
[1] | Certain amounts have been revised to reflect the retrospective application of the Company’s change in inventory costing method for certain U.S. inventories to the FIFO method from the LIFO method. Refer to Note 2, “Summary of Significant Accounting Policies - Inventories,” of the notes to consolidated financial statements for further details surrounding this accounting policy change.

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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + 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 (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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