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Stockholders' Equity - Additional Information 4 (Detail) (USD $)
 12 Months Ended 3 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2012
Feb. 28, 2014
Feb. 28, 2013
Feb. 14, 2013
Sep. 01, 2012
Mar. 27, 2012
Sep. 30, 2012
Sep. 01, 2014
Sep. 01, 2013
Mar. 14, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Period in the beginning of each year to award Performance Share Unit 90 days                        
PSU awards performance period 3 years                        
Share-based incentive compensation $ 54,100,000us-gaap_ShareBasedCompensation $ 24,100,000us-gaap_ShareBasedCompensation [1] $ 16,900,000us-gaap_ShareBasedCompensation [1]                    
Weighted average return on total share holders 35.00%see_PercentageOfWeightedAverageReturnOnCapital                        
Target level for the determination of performance goals and measures for adjusted EBITDA goal 65.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasuresForAdjustedEbitdaGoal                        
PSU awards performance period beginning date Jan. 01, 2014                        
PSU awards performance period Ending date Dec. 31, 2016                        
Target level for the determination of performance goals and measures 100.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasures                        
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level 121,200see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtRoicTargetLevel                        
Restricted stock shares issued for new awards under the Omnibus Incentive Plan and 2005 Contingent Stock Plan 572,089us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation 398,230us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation 703,620us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation                    
Share based compensation stock award premium 25.00%see_ShareBasedCompensationStockAwardPremium                        
Share based compensation expense recognized period 15 months                        
Awards vest at grant date Mar. 15, 2015 Mar. 15, 2014 Mar. 15, 2013                    
2005 Contingent Stock Plan [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Targeted number of common stock shares to be earned under the performance incentive plan       350,000see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlan
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		                  
Per share price of common stock $ 32.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		 $ 27.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		 $ 17.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		                    
Restricted shares issued       50,000see_RestrictedStockIssuedBasedOnPerformanceBasedGrants
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		                  
PSU Awards [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Dividends accrued in other current liabilities 2,000,000us-gaap_DividendsPayableCurrent
/ us-gaap_AwardTypeAxis
= see_PsuAwardsMember		 1,000,000us-gaap_DividendsPayableCurrent
/ us-gaap_AwardTypeAxis
= see_PsuAwardsMember		                      
Performance Shares [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Adjusted free cash flow 1,700,000,000see_AdjustedFreeCashFlowIncome
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		                        
PSU awards performance period 3 years                        
Percentage of reduction in amount earned based on free cash flow performance 25.00%see_PercentageOfReductionInAmountEarnedOnFreeCashFlowPerformance
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		                        
Stock incentive plan description to further balance the incentives, the amount earned based on adjusted free cash flow performance will be reduced by 25% if our relative Total Stockholder Return (as defined in the award) for the performance period is below a certain percentile of an approved peer group of companies.                        
PSU program pay out description payment of 50% of any PSUs earned during the performance period will be made during the first quarter of 2017. The remaining 50% of the earned PSUs is subject to an additional 2017 performance requirement, the ratio of working capital to net trade sales for 2017 (as defined in the award) and will be paid during the first quarter of 2018                        
Share-based incentive compensation 12,000,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		                        
2014 Three-year PSU Awards [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Share-based incentive compensation 6,800,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember		                        
Targeted number of common stock shares to be earned under the performance incentive plan 346,286see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember		                        
Per share price of common stock $ 32.65us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember		                        
Valuation per share $ 42.97see_Valuation
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember		                        
Target level for the determination of performance goals and measures 158.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasures
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember		                        
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level 355,636see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtRoicTargetLevel
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember		                        
2014 Three-year PSU Awards [Member] | Minimum [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares to be issued as a percentage of target shares under the performance incentive plan 0.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		                        
2014 Three-year PSU Awards [Member] | Maximum [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares to be issued as a percentage of target shares under the performance incentive plan 200.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandFourteenThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                        
2013 Three-year PSU Awards [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
PSU awards performance period   3 years                      
Share-based incentive compensation 8,200,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		 4,400,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		                      
Weighted average return on total share holders   35.00%see_PercentageOfWeightedAverageReturnOnCapital
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		                      
Target level for the determination of performance goals and measures for adjusted EBITDA goal   65.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasuresForAdjustedEbitdaGoal
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		                      
PSU awards performance period beginning date   Jan. 01, 2013                      
PSU awards performance period Ending date   Dec. 31, 2015                      
Targeted number of common stock shares to be earned under the performance incentive plan   571,931see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		                      
Per share price of common stock           $ 22.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		 $ 18.97us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		            
Valuation per share           $ 34.05see_Valuation
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		 $ 25.19see_Valuation
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		            
Target level for the determination of performance goals and measures 100.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasures
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		                        
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level 200,176see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtRoicTargetLevel
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember		                        
2013 Three-year PSU Awards [Member] | Minimum [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares to be issued as a percentage of target shares under the performance incentive plan   0.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		                      
2013 Three-year PSU Awards [Member] | Maximum [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares to be issued as a percentage of target shares under the performance incentive plan   200.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                      
Target level for the determination of performance goals and measures 200.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasures
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                        
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level 743,511see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtRoicTargetLevel
/ us-gaap_AwardTypeAxis
= see_TwoThousandThirteenThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                        
2012 Three-year PSU Awards [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Share-based incentive compensation 1,800,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		 2,400,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		 1,900,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                    
Weighted average return on total share holders     25.00%see_PercentageOfWeightedAverageReturnOnCapital
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                    
Targeted number of common stock shares to be earned under the performance incentive plan 432,573see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                        
Per share price of common stock               $ 14.27us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		 $ 19.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		        
Valuation per share               $ 12.57see_Valuation
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		 $ 23.40see_Valuation
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		        
Target level for the determination of performance goals and measures 100.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasures
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                        
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level 108,143see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtRoicTargetLevel
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                        
Growth of net trade sales     25.00%see_PercentageOfMaximumCustomersSharesInCompanySConsolidatedNetSales
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                    
Average return on invested capital     50.00%see_PercentageOfReturnOnCapital
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                    
Recordable incident rate to be achieved under additional goal 0.90 or better                        
Shares granted               140,155see_NumberOfSharesAvailableForPurchaseUnderOptionGranted
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		 292,418see_NumberOfSharesAvailableForPurchaseUnderOptionGranted
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		        
Aggregate increase or decrease in the number of shares earned for all participants based on the performance 43,257see_AggregateIncreaseOrDecreaseInNumberOfSharesEarnedForAllParticipantsBasedOnPerformance
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                        
Targeted number of common stock shares to be earned under performance incentive plan at threshold for minimum payment 0see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtVolumeTargetLevel
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                        
Percentage targeted number of common stock shares net of forfeiture related to volume goal 0.00%see_PercentageTargetedNumberOfCommonStockSharesNetOfForfeitureRelatedToVolumeGoal
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember		                        
2012 Three-year PSU Awards [Member] | 2005 Contingent Stock Plan [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares granted                   140,155see_NumberOfSharesAvailableForPurchaseUnderOptionGranted
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		      
2012 Three-year PSU Awards [Member] | Minimum [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares to be issued as a percentage of target shares under the performance incentive plan 0.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		                        
2012 Three-year PSU Awards [Member] | Maximum [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares to be issued as a percentage of target shares under the performance incentive plan 200.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                        
Target level for the determination of performance goals and measures 102.00%see_TargetLevelForDeterminationOfPerformanceGoalsMeasures
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                        
Targeted number of common stock shares to be earned under the performance incentive plan at ROIC target level 221,045see_TargetedNumberOfCommonStockSharesToBeEarnedUnderPerformanceIncentivePlanAtRoicTargetLevel
/ us-gaap_AwardTypeAxis
= see_TwoThousandTwelveThreeYearPsuAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		                        
2011 Three-year PSU Awards [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Share-based incentive compensation   (1,200,000)us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandElevenThreeYearPsuAwardsMember		 1,700,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandElevenThreeYearPsuAwardsMember		                    
Shares to be issued as a percentage of target shares under the performance incentive plan         42.00%see_SharesToBeIssuedAsPercentageOfTargetSharesUnderPerformanceIncentivePlan
/ us-gaap_AwardTypeAxis
= see_TwoThousandElevenThreeYearPsuAwardsMember		                
Restricted stock shares issued for new awards under the Omnibus Incentive Plan and 2005 Contingent Stock Plan 145,597us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandElevenThreeYearPsuAwardsMember		       145,597us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandElevenThreeYearPsuAwardsMember		                
Acquired stock under 2005 contingent stock plan         54,384us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_TwoThousandElevenThreeYearPsuAwardsMember		                
Restricted Stock [Member] | 2005 Contingent Stock Plan [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Shares expected to be issued                     25,000see_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfExpectedSharesIssue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		 25,000see_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfExpectedSharesIssue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= see_TwoThousandFiveContingentStockPlanMember		  
SLO Awards [Member]                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Share-based incentive compensation $ 4,600,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember		 $ 2,800,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember		 $ 700,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember		                    
Share based compensation stock award premium 25.00%see_ShareBasedCompensationStockAwardPremium
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember		 25.00%see_ShareBasedCompensationStockAwardPremium
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember		                      
Restricted stock shares and restricted stock units included in SLO Award target 114,525see_RestrictedStockSharesAndRestrictedStockUnitsIncludedInAwardTarget
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember		                       141,669see_RestrictedStockSharesAndRestrictedStockUnitsIncludedInAwardTarget
/ us-gaap_AwardTypeAxis
= see_SloAwardsMember
[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.