Schedule of Derivatives not Designated as Hedging Instruments (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 25, 2011	Dec. 25, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 21.9		$ 51.6
Fair Value	0		0.1
Amount of Gain (Loss) Recognized In Income	0.8	(1.5)
Foreign Exchange Contracts | Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	16.5		6.7
Fair Value	0
Foreign Exchange Contracts | Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	5.4		44.9
Fair Value	0		0.1
Foreign Exchange Contracts | Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized In Income	0	(0.2)
Foreign Exchange Contracts | Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized In Income	$ 0.8	$ (1.3)