Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 29, 2012 LegalMatter	Dec. 31, 2011	Oct. 01, 2011
Commitments and Contingencies [Line Items]
Number Of Lawsuits	1,900
Number Of Claims In Lawsuit	2,400
Liability For claims and contingencies	$ 68.2	$ 0.6	$ 0.6
Liability reserve for insurance claims	50.3	0	0
Environmental Reserve	14.1	1.5	1.4
Outstanding Value Of Letters Of Credit	461.9	136.2	146.2
Assumed in Merger
Commitments and Contingencies [Line Items]
Environmental Reserve	12.9
Outstanding Value Of Letters Of Credit	$ 317.3