Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011	Mar. 30, 2012 Accelerated amortization of intangible assets	Sep. 28, 2012 Accelerated amortization of intangible assets
Finite-Lived Intangible Assets [Line Items]
Restructuring expense	$ 3.3	$ 19.5	$ 110.2	$ 20.5	$ 47.7	$ 47.7