DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Derivatives, Fair Value [Line Items]      
Asset derivatives $ 4.1 $ 7.2 $ 6.5
Liability derivatives 8.3 7.3 9.6
Designated as Hedging Instrument
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 0 1.2 0
Liability derivatives 7.8 7.3 9.2
Designated as Hedging Instrument | Interest Rate Contract Gains | Other Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 0 0 0
Designated as Hedging Instrument | Interest Rate Contract Loss | Long-term Debt
     
Derivatives, Fair Value [Line Items]      
Liability derivatives 5.2 7.3 8.1
Designated as Hedging Instrument | Commodity Contracts Losses | Other Current Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 0 (2.4) 0
Designated as Hedging Instrument | Commodity Contracts Losses | Accrued Liabilities
     
Derivatives, Fair Value [Line Items]      
Liability derivatives 3.7 0 4.0
Designated as Hedging Instrument | Commodity Contracts Gains | Other Current Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 0 3.6 0
Designated as Hedging Instrument | Commodity Contracts Gains | Accrued Liabilities
     
Derivatives, Fair Value [Line Items]      
Liability derivatives (1.1) 0 (2.9)
Not Designated as Hedging Instrument
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 4.1 6.0 6.5
Liability derivatives 0.5 0 0.4
Not Designated as Hedging Instrument | Interest Rate Contract Gains | Other Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 4.9 7.6 8.4
Not Designated as Hedging Instrument | Interest Rate Contract Gains | Other Liabilities
     
Derivatives, Fair Value [Line Items]      
Liability derivatives 0 0 0
Not Designated as Hedging Instrument | Interest Rate Contract Loss | Other Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives (0.8) (1.7) (1.9)
Not Designated as Hedging Instrument | Interest Rate Contract Loss | Other Liabilities
     
Derivatives, Fair Value [Line Items]      
Liability derivatives 0 0 0
Not Designated as Hedging Instrument | Commodity Contracts Losses | Other Current Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 0 (0.1) 0
Not Designated as Hedging Instrument | Commodity Contracts Losses | Accrued Liabilities
     
Derivatives, Fair Value [Line Items]      
Liability derivatives 0.5 0 0.4
Not Designated as Hedging Instrument | Commodity Contracts Gains | Other Current Assets
     
Derivatives, Fair Value [Line Items]      
Asset derivatives 0 0.2 0
Not Designated as Hedging Instrument | Commodity Contracts Gains | Accrued Liabilities
     
Derivatives, Fair Value [Line Items]      
Liability derivatives $ 0 $ 0 $ 0