EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ 5.3	$ 0.0
Net periodic benefit cost	2.1	9.0
Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	3.7	3.6
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	5.3	0.0
Net periodic benefit cost	1.9	$ 9.5
Turnaround Plan | International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ 5.3