Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions	9 Months Ended			3 Months Ended
	Oct. 01, 2011 Maximum Centredale Site	Oct. 01, 2011 Minimum Centredale Site	Oct. 01, 2011 Centredale Site	Oct. 01, 2011 Maximum Property, Plant and Equipment, Other Types	Oct. 01, 2011 Minimum Property, Plant and Equipment, Other Types	Oct. 01, 2011 Property, Plant and Equipment, Other Types	Jan. 01, 2011 Property, Plant and Equipment, Other Types
Loss Contingencies [Line Items]
Environmental remediation deemed probable and reasonably estimable	$ 212.9	$ 68.3		$ 353.9	$ 140.8
Environmental remediation costs, reserve			68.3			168.5	173.0
Reserve for environmental remediation costs, current						10.6
Reserve for environmental remediation costs, noncurrent						$ 157.9