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Fair Value Measurements (Financial Assets And Liabilities Carried At Fair Value) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 30, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, Assets $ 332.3 $ 287.0
Deferred compensation plans, Liabilities 62.2 58.2
Currency swap agreement, Liabilities 37.9 53.9
Quoted Prices In Active Market (Level 1) [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, Assets 332.3 287.0
Significant Other Observable Inputs (Level 2) [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Deferred compensation plans, Liabilities 62.2 58.2
Currency swap agreement, Liabilities 37.9 53.9
Significant Unobservable Inputs (Level 3) [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities, Assets      
Deferred compensation plans, Liabilities      
Currency swap agreement, Liabilities