RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Jul. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Turnaround Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, plan term	4 years
Restructuring costs incurred to date		$ 8.7
Additional restructuring charges		30.0
Restructuring reserve		6.6					$ 0.0
Payments for restructuring		0.6
Turnaround Plan | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring				$ 0.2	$ 1.1	$ 5.3
Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		498.3
Restructuring reserve		50.2					67.0
Payments for restructuring		11.8
Global Integration Activities | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring				2.0	15.7	32.5
2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		84.4
Restructuring reserve		12.2					17.1
Payments for restructuring		2.7
2018 Restructuring | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring				0.4	0.9	10.9
Other Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		(0.2)	$ (0.1)
Restructuring liabilities assumed		$ 4.2					$ 9.0
Other Restructuring Plan | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring				$ 0.3	$ 1.9	$ 2.0