Other Post-Employment Benefits and Other Employee Benefit Plans - Estimated Future Benefit Payments (Detail) (Other Postretirement Benefit Plans Legacy Sealed Air [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Other Postretirement Benefit Plans Legacy Sealed Air [Member]
Defined Benefit Plan Disclosure [Line Items]
2013	$ 5.3
2014	5.3
2015	5.2
2016	5.1
2017	5.1
Thereafter	25.6
Total	$ 51.6