RESTRUCTURING COSTS - Restructuring Costs By Program (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 6.7	$ 42.7	$ 43.7	$ 75.6
Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2.6	33.3	31.3	58.2	$ 106.5	$ 364.2
2018 Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Restructuring costs	4.5	8.6	13.3	20.5
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ (0.4)	$ 0.8	$ (0.9)	$ (3.1)