RESTRUCTURING COSTS - Restructuring Roll Forward (Details) - Transformation Plan $ in Millions	12 Months Ended
	Jun. 30, 2021 USD ($)
Restructuring Reserve [Roll Forward]
Balance—July 1, 2020	$ 132.6
Restructuring charges	106.4
Payments	(88.8)
Changes in estimates	(33.2)
Non-cash utilization	0.5
Adjustment for sale of Wella Business	(0.6)
Effect of exchange rates	5.9
Balance—June 30, 2021	122.8
Severance and Employee Benefits
Restructuring Reserve [Roll Forward]
Balance—July 1, 2020	131.9
Restructuring charges	106.5
Payments	(88.0)
Changes in estimates	(33.1)
Non-cash utilization	0.0
Adjustment for sale of Wella Business	(0.6)
Effect of exchange rates	5.8
Balance—June 30, 2021	122.5
Fixed Asset Write-offs
Restructuring Reserve [Roll Forward]
Balance—July 1, 2020	0.0
Restructuring charges	(0.5)
Payments	0.0
Changes in estimates	0.0
Non-cash utilization	0.5
Adjustment for sale of Wella Business	0.0
Effect of exchange rates	0.0
Balance—June 30, 2021	0.0
Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance—July 1, 2020	0.7
Restructuring charges	0.4
Payments	(0.8)
Changes in estimates	(0.1)
Non-cash utilization	0.0
Adjustment for sale of Wella Business	0.0
Effect of exchange rates	0.1
Balance—June 30, 2021	$ 0.3