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Commitments and Contingencies - Additional Information (Detail)
$ in Millions
Sep. 26, 2015
USD ($)
LegalMatter
Dec. 31, 2014
USD ($)
Loss Contingencies [Line Items]    
Number of asbestos-related claims outstanding | LegalMatter 4,200  
Estimated liability for asbestos-related claims $ 240.1 $ 249.1
Estimated receivable for asbestos-related insurance recoveries 111.3 115.8
Environmental reserve 22.5 31.4
Letters of credit outstanding $ 421.2 $ 370.1