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Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 29, 2012	Jun. 29, 2012	Jul. 01, 2011
Finite-Lived Intangible Assets [Line Items]
Restructuring expense	$ 0.9	$ 106.9	$ 1.0
Accelerated amortization of intangible assets
Finite-Lived Intangible Assets [Line Items]
Restructuring expense		$ 47.7

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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