Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details)

v3.5.0.2
PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2016
Pension Plans, Defined Benefit [Member]          
Definted Benefit Plan Disclosure [Line Items]          
Reduction in other postretirement benefit expense $ (1.9)   $ (6.1)    
Total service and interest costs for other post retirement benefit plans 12.0   35.9    
Pension Contributions 0.5 $ 23.9 0.7 $ 34.1  
Other Postretirement Benefit Plans, Defined Benefit [Member]          
Definted Benefit Plan Disclosure [Line Items]          
Reduction in other postretirement benefit expense (0.2)   (1.4)    
Total service and interest costs for other post retirement benefit plans 2.7   8.1    
Other Postretirement Benefit Expense $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Scenario, Forecast [Member] | Pension Plans, Defined Benefit [Member]          
Definted Benefit Plan Disclosure [Line Items]          
Reduction in net periodic benefit expense         $ 8.2
Reduction in other postretirement benefit expense         $ 1.8