Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified			9 Months Ended				9 Months Ended
	Sep. 29, 2012 sites	Sep. 29, 2012 Centredale Site	Sep. 29, 2012 Centredale Site Minimum	Sep. 29, 2012 Centredale Site Maximum	Sep. 29, 2012 Property, Plant and Equipment, Other Types	Dec. 31, 2011 Property, Plant and Equipment, Other Types	Sep. 29, 2012 Property, Plant and Equipment, Other Types Minimum	Sep. 29, 2012 Property, Plant and Equipment, Other Types Maximum
Loss Contingencies [Line Items]
Environmental remediation costs deemed probable and reasonably estimable			$ 68.1	$ 139.7			$ 141.3	$ 282.6
Environmental remediation costs, reserve		68.1			164.0	164.8
Superfund Sites	31
Reserve for environmental remediation costs, current					10.7
Reserve for environmental remediation costs, noncurrent					$ 153.3