EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ 2.7	$ 0.0	$ 8.0	$ 0.0
Net periodic benefit cost	0.6	8.1	8.3	26.4
Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	0.0	3.6	6.2	10.8
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	2.7	0.0	8.0	0.0
Net periodic benefit cost	$ 0.4	$ 8.3	7.7	27.0
Transformation Plan | International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain			$ 8.0	$ 0.0