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