Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2016
Pension Plans, Defined Benefit [Member]      
Definted Benefit Plan Disclosure [Line Items]      
Reduction in net periodic benefit expense $ 2.1    
Reduction in other postretirement benefit expense 0.6    
Defined Benefit Plan, Net Periodic Benefit Cost 12.0    
Pension Contributions 0.3 $ 3.9  
Other Postretirement Benefit Plans, Defined Benefit [Member]      
Definted Benefit Plan Disclosure [Line Items]      
Total service and interest costs for other post retirement benefit plans 2.7    
Other Postretirement Benefit Expense $ 0.0 $ 0.0  
Scenario, Forecast [Member] | Pension Plans, Defined Benefit [Member]      
Definted Benefit Plan Disclosure [Line Items]      
Reduction in net periodic benefit expense     $ 8.4
Reduction in other postretirement benefit expense     $ 2.3