Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 26, 2014	Dec. 31, 2013
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Exchange Contract [Member]
Foreign currency exchange contracts	$ 0.2	$ 0.1
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Measurements, Recurring [Member] | Demand and Time Deposits [Member]
Cash and cash equivalents	436.6	447.5
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Cash and cash equivalents	55.5	62.0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Demand and Time Deposits [Member]
Cash and cash equivalents	436.6	447.5
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Cash and cash equivalents	55.5	62.0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member]
Foreign currency exchange contracts	$ 0.2	$ 0.1