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Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 12 Months Ended | 0 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 13, 2014 | Dec. 31, 2014 | Feb. 17, 2015 | Dec. 31, 2013 | Aug. 09, 2007 | Jan. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Common stock repurchase value | $ 130.0 us-gaap_TreasuryStockValue | $ 481.4 us-gaap_TreasuryStockValue |  | $ 327.6 us-gaap_TreasuryStockValue | [1] |  |
Number of common stock shares repurchased | 3,932,244 us-gaap_TreasuryStockSharesAcquired | 1,495,188 us-gaap_TreasuryStockSharesAcquired |  |  |  |  |
Common stock repurchase price per share | $ 33.06 us-gaap_TreasuryStockAcquiredAverageCostPerShare |  |  |  |  |  |
Number of shares authorized to be repurchased |  |  |  |  |  | 20,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased |
Common stock, shares outstanding |  | 210,531,894 us-gaap_CommonStockSharesOutstanding |  | 196,198,672 us-gaap_CommonStockSharesOutstanding |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Dividends declared per common share |  |  | $ 0.13 us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Estimated dividend payment |  |  |  |  |  |  | 27 us-gaap_DividendsPayableCurrentAndNoncurrent / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Common stock, shares outstanding |  |  |  |  |  |  | 210,000,000 us-gaap_CommonStockSharesOutstanding / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Dividends declared date |  |  | Feb. 17, 2015 |  |  |  |
Dividends declared payable date |  |  | Mar. 20, 2015 |  |  |  |
Dividends declared date of record |  |  | Mar. 06, 2015 |  |  |  |
Share Trading Plan [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Common stock repurchase value |  | 54.0 us-gaap_TreasuryStockValue / us-gaap_PlanNameAxis = see_ShareTradingPlanMember |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Common stock in treasury, value increase | 130 see_IncreaseInTreasuryStock / us-gaap_ShareRepurchaseProgramAxis = us-gaap_CommonStockMember |  |  |  |  |  |
Committed Credit Facility [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Funding of stock repurchase program | 110 see_FinancingOfStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = see_CommittedCreditFacilityMember |  |  |  |  |  |
Cash and Cash Equivalents [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Funding of stock repurchase program | $ 20 see_FinancingOfStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = us-gaap_CashAndCashEquivalentsMember |  |  |  |  |  |
[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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