RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Acquisition Integration Program
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring and related costs	$ 65.0
Curtailment gain	1.8
Remaining accrual	41.8					$ 43.4
Cash expenditures	6.9
Acquisition Integration Program | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred	60.8
Acquisition Integration Program | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures		$ 5.0	$ 3.0	$ 17.6	$ 16.2
Organizational Redesign
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred	109.9
Remaining accrual	26.1					34.5
Cash expenditures	12.5
Organizational Redesign | Corporate | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred	26.3
Organizational Redesign | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures				3.7	22.4
Organizational Redesign | Minimum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring and related costs	145.0
Organizational Redesign | Maximum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring and related costs	180.0
Productivity Program
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred	51.8
Remaining accrual	6.0					$ 6.2
Cash expenditures	0.6
Productivity Program | Corporate | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred	$ 12.9
Productivity Program | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures				$ 1.0	$ 5.0