EMPLOYEE BENEFITS (Amounts in AOCI not Recognized as Components of Net Periodic Benefit Cost) (Details) $ in Millions	6 Months Ended
	Dec. 31, 2017 USD ($)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Total plans, at the beginning of period	$ (0.8)
Total plans - Deferrals	(5.0)
Total plans - Net Change in AOCL	(5.0)
Total plans, at the end of period	(5.8)
Post-Retirement Benefit Plans [Member]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net actuarial (loss) gain, at the beginning of period	(1.2)
Deferred income tax benefit (expense), at the beginning of period	(0.4)
Total plans, at the beginning of period	(0.8)
Net actuarial (loss) gain, at the end of period	(1.2)
Deferred income tax benefit (expense), at the end of period	0.4
Total plans, at the end of period	(0.8)
Pension Plans [Member]
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net actuarial (loss) gain - Deferrals	1.3
Prior service benefit (cost) - Deferrals	(8.0)
Deferred income tax benefit (expense) - Deferrals	1.7
Total plans - Deferrals	(5.0)
Net actuarial (loss) gain - Net Change in AOCL	1.3
Prior service benefit (cost) - Net Change in AOCL	(8.0)
Deferred income tax benefit (expense) - Net Change in AOCL	1.7
Total plans - Net Change in AOCL	5.0
Net actuarial (loss) gain, at the end of period	1.3
Prior service benefit (cost), at the end of period	(8.0)
Deferred income tax benefit (expense), at the end of period	1.7
Total plans, at the end of period	$ (5.0)