RESTRUCTURING COSTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2018	Oct. 01, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		$ (0.1)
Expected remaining costs		1.0				$ 3.9
Cash expenditures for restructuring		(0.6)	$ (4.7)
Restructuring and related cost, expected cost		9.0
Restructuring liabilities assumed		5.6				9.4
Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		502.0
Expected remaining costs		25.0
Remaining accrual		82.4				223.1
Cash expenditures for restructuring		140.6
Restructuring charges		39.1
Global Integration Activities | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures for restructuring	$ 25.7			$ 9.4	$ 47.3
2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		81.7
Remaining accrual		18.1				51.5
Cash expenditures for restructuring		46.0
Restructuring charges		14.9
2018 Restructuring | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures for restructuring	7.5			0.1	10.5
Other Restructuring 2018 | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures for restructuring	1.2			2.0	2.4
Other Restructuring Programs, Assumed Proctor and Gamble Restructuring
Restructuring Cost and Reserve [Line Items]
Remaining accrual		3.6				7.0
Cash expenditures for restructuring		(0.2)	$ 1.6
Restructuring liabilities assumed							$ 21.7
Other Restructuring Programs, Assumed Proctor and Gamble Restructuring | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Cash expenditures for restructuring	$ 0.4			$ 0.5	$ 2.7
Other Restructuring | Global Integration Activities
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		10.4
Remaining accrual		1.6				3.1
Cash expenditures for restructuring		3.2
Restructuring charges		1.9
Other Restructuring | 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date		4.7
Remaining accrual		1.6				$ 3.3
Cash expenditures for restructuring		2.8
Restructuring charges		$ 1.3