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Basis of Presentation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 02, 2011
Oct. 02, 2011
Sep. 30, 2012
Jul. 03, 2012
Dec. 31, 2011
Product Information [Line Items]          
Reclassified amount from cost of service revenues to cost of product revenues $ 0.8 $ 2.5      
Cash surrender values, Gross     18.8   26.1
Gross amount of policy loans     17.4   16.0
Cash surrender values, Net of policy loans       $ 1.4 $ 10.1