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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Pension Plans, Defined Benefit [Member]        
Definted Benefit Plan Disclosure [Line Items]        
Pension Contributions $ 2.3 $ 0.0 $ 2.3 $ 0.3
Other Postretirement Benefit Plans, Defined Benefit [Member]        
Definted Benefit Plan Disclosure [Line Items]        
OPEB Contributions $ 0.0 $ 0.0 $ 0.0 $ 0.0