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Other Post-Employment Benefits and Other Employee Benefit Plans - One Percentage Point Change On Assumed Healthcare Cost (Detail) (Other Postretirement Benefit Plans Legacy Sealed Air [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Other Postretirement Benefit Plans Legacy Sealed Air [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Effect on total of service and interest cost components, 1% Increase $ 0.1
Effect on post-retirement benefit obligation, 1% Increase 2.3
Effect on total of service and interest cost components, 1% Decrease (0.1)
Effect on post-retirement benefit obligation, 1% Decrease $ (2.6)