Schedule of Derivatives not Designated as Hedging Instruments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 28.7		$ 12.1
Fair Value	(0.1)
Amount of Gain (Loss) Recognized In Income	(0.1)	0.5
Foreign Exchange Contracts | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	28.7		12.1
Fair Value	(0.1)
Foreign Exchange Contracts | Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized In Income	0.1	0.1
Foreign Exchange Contracts | Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized In Income	$ (0.2)	$ 0.4