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Derivative Instruments And Hedging Activities (Schedule Of Derivative Instruments In Statement Of Financial Position, Fair Value) (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 94.0 $ 165.9
Derivative liability, fair value 25.3 23.0
Accounts Receivable [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 19.2 83.8
Designated as Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 10.1 5.2
Designated as Hedging Instrument [Member] | Treasury Lock Agreements [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 9.5 3.5
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 9.5 3.5
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 10.1 5.2
Not Designated as Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 83.9 160.7
Derivative liability, fair value 15.8 19.5
Not Designated as Hedging Instrument [Member] | Accounts Receivable [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 19.2 83.8
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value   2.8
Not Designated as Hedging Instrument [Member] | Customer Contracts [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 61.4 72.9
Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 15.8 19.5
Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 3.3 $ 1.2