Schedule of Standard Product Warranty Liabilities (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Product Warranty Liability [Line Items]
Balance - beginning of period	$ 17.3	$ 21.2	$ 17.0	$ 19.4
Accruals for product warranties	1.0	2.1	2.9	4.9
Settlements	(1.3)	(1.9)	(2.2)	(2.3)
Other adjustments to accruals for product warranties	(0.7)	(1.4)	(1.4)	(2.0)
Balance - end of period	$ 16.3	$ 20.0	$ 16.3	$ 20.0