EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Service period	90 days
Percent of Company match to plan	100.00%
Percent of employee salary eligible for contribution	6.00%
Curtailment gain	$ 14.9	$ 5.4	$ 10.3
Net periodic benefit cost	15.9	29.5	32.4
Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	14.4	12.2	14.9
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	0.8	0.0	10.4
Net periodic benefit cost	(4.0)	(2.7)	(13.0)
Expected contributions	2.9
U.S.
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	20.5	20.4	22.0
U.S. | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	0.0	0.0	0.0
Accumulated benefit obligation	18.5	17.7
Net periodic benefit cost	1.3	0.0	0.0
Expected contributions	1.3
International
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	14.1	12.9	18.3
International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	14.1	5.4	(0.1)
Accumulated benefit obligation	712.1	733.7
Net periodic benefit cost	18.6	32.2	45.4
Expected contributions	33.6
International | Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain			$ 10.4
Turnaround Plan | International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ 14.1
Global Integration Activities | International | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain		$ 5.1