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Commitments And Contingencies (Summary Of Product Warranty Accrual Activity) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Gain Contingencies [Line Items]
Beginning of period	$ 18.4	$ 18.0	$ 18.6	$ 16.9
Additions	2.6	3.8	7.7	11.4
Usage	(2.1)	(3.7)	(7.4)	(10.2)
End of period	$ 18.9	$ 18.1	$ 18.9	$ 18.1

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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