Derivatives (Schedule Of Derivatives Not Designated As Hedging Instruments) (Details) (Derivatives Not Designated As Hedging Instruments [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 18.3	$ 20.7
Fair Value		0
Amount of Gain (Loss) Recognized In Income	(0.4)	0.2
Foreign Exchange Contracts [Member] | Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized In Income	(0.2)	(0.2)
Foreign Exchange Contracts [Member] | Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized In Income	(0.2)	0.4
Foreign Exchange Contracts [Member] | Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	4.6
Foreign Exchange Contracts [Member] | Current Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	13.7	20.7
Fair Value		$ 0