PENSION AND POST-RETIREMENT BENEFITS - Additional Information (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 20.0
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 2.4	4.8
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 0.3	$ 0.4