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PENSION AND POST RETIREMENT PLANS (Details 4) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension Benefits
      
Change in Benefit Obligation      
Benefit obligation at beginning of year $ 210.1 $ 192.6  
Service cost 2.9 2.7 5.4
Interest cost 8.6 9.0 10.7
Actuarial (gain) loss (13.3) 14.9  
Benefits paid (9.8) (9.1)  
Expenses paid (0.9)    
Benefit obligation at end of year 197.5 210.1 192.6
Changes in plan assets      
Balance at the beginning of the period 149.2 126.0  
Actual return on plan assets 30.8 19.0  
Employer contribution 3.5 13.3 4.4
Benefits paid (9.8) (9.1)  
Expenses paid (0.9)    
Balance at the end of the period 172.8 149.2 126.0
Funded Status and Recognized Liability (24.7) (60.9)  
Qualified Plans
      
Change in Benefit Obligation      
Benefit obligation at end of year 197.5 210.1  
Changes in plan assets      
Balance at the end of the period 172.8 149.2  
Other Post-retirement Benefits
      
Change in Benefit Obligation      
Benefit obligation at beginning of year 49.2 48.5  
Service cost 1.1 1.0 0.9
Interest cost 2.1 2.3 3.0
Plan participants' contributions 0.9 1.3  
Actuarial (gain) loss 2.0 (0.6)  
Benefits paid (3.2) (3.3)  
Benefit obligation at end of year 52.1 49.2 48.5
Changes in plan assets      
Plan participants' contributions 0.9 1.3  
Employer contribution 2.3 2.0  
Benefits paid (3.2) (3.3)  
Funded Status and Recognized Liability $ (52.1) $ (49.2)