EMPLOYEE BENEFITS (Net Periodic Pension Benefit Income) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2018
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.7	$ 2.1
Interest cost	0.9	1.6
Expected return on plan assets	(1.4)	(2.5)
Amortization of loss from earlier periods	0.2	0.2
Net periodic pension benefit expense	0.4	1.4
Post-retirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.1
Interest cost	0.1	0.3
Net periodic pension benefit expense	$ 0.1	$ 0.4