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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 $ 130.0us-gaap_TreasuryStockValue $ 481.4us-gaap_TreasuryStockValue   $ 327.6us-gaap_TreasuryStockValue [1]    
Number of common stock shares repurchased 3,932,244us-gaap_TreasuryStockSharesAcquired 1,495,188us-gaap_TreasuryStockSharesAcquired        
Common stock repurchase price per share $ 33.06us-gaap_TreasuryStockAcquiredAverageCostPerShare          
Number of shares authorized to be repurchased         20,000,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased  
Common stock, shares outstanding   210,531,894us-gaap_CommonStockSharesOutstanding   196,198,672us-gaap_CommonStockSharesOutstanding    
Subsequent Event [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Dividends declared per common share     $ 0.13us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		      
Estimated dividend payment           27us-gaap_DividendsPayableCurrentAndNoncurrent
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Common stock, shares outstanding           210,000,000us-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   54.0us-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 130see_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 110see_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 $ 20see_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.