Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule Of Derivative Instruments In Statement Of Financial Position, Fair Value) (Details)

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule Of Derivative Instruments In Statement Of Financial Position, Fair Value) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 66.4 $ 78.6
Derivative liability, fair value 15.3 13.2
Designated as Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 13.1 16.2
Derivative liability, fair value 8.5 1.9
Not Designated as Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 53.3 62.4
Derivative liability, fair value 6.8 11.3
Significant Other Observable Inputs (Level 2) [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 13.1 16.2
Significant Other Observable Inputs (Level 2) [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 8.5 1.9
Market Approach [Member] | Managements Estimate Of 62% Fee [Member] | Significant Unobservable Inputs (Level 3) [Member] | Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value 3.9 3.5
Market Approach [Member] | Managements Estimate Of 62% Fee [Member] | Significant Unobservable Inputs (Level 3) [Member] | Not Designated as Hedging Instrument [Member] | Provisional Pricing Arrangements [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 6.8 11.3
Market Approach [Member] | Hot-Rolled Steel Estimate [Member] | Significant Unobservable Inputs (Level 3) [Member] | Not Designated as Hedging Instrument [Member] | Customer Supply Agreement [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value      
Market Approach [Member] | Hot-Rolled Steel Estimate [Member] | Significant Unobservable Inputs (Level 3) [Member] | Not Designated as Hedging Instrument [Member] | Customer Supply Agreement [Member] | Derivative Assets (Current) [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 49.4 $ 58.9