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Basis of Presentation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 03, 2011	Jul. 03, 2011	Jul. 02, 2012	Dec. 31, 2011
Product Information [Line Items]
Reclassified amount from cost of service revenues to cost of product revenues	$ 0.8	$ 1.7
Cash surrender values, Gross			22.9	26.1
Gross amount of policy loans			21.4	16.0
Cash surrender values, Net of policy loans			$ 1.5	$ 10.1

- Definition

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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