RESTRUCTURING COSTS - Restructuring Roll Forward (Details) - Transformation Plan $ in Millions	6 Months Ended
	Dec. 31, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 132.6
Restructuring charges	109.7
Payments	(40.4)
Changes in estimates	(16.0)
Non-cash utilization	0.4
Adjustment for sale of the Wella Business	(0.6)
Effect of exchange rates	9.9
Ending balance	195.6
Severance and Employee Benefits
Restructuring Reserve [Roll Forward]
Beginning balance	131.9
Restructuring charges	109.7
Payments	(40.2)
Changes in estimates	(16.0)
Non-cash utilization	0.0
Adjustment for sale of the Wella Business	(0.6)
Effect of exchange rates	9.9
Ending balance	194.7
Fixed Asset Write-offs
Restructuring Reserve [Roll Forward]
Beginning balance	0.0
Restructuring charges	(0.4)
Payments	0.0
Changes in estimates	0.0
Non-cash utilization	0.4
Adjustment for sale of the Wella Business	0.0
Effect of exchange rates	0.0
Ending balance	0.0
Other Exit Costs
Restructuring Reserve [Roll Forward]
Beginning balance	0.7
Restructuring charges	0.4
Payments	(0.2)
Changes in estimates	0.0
Non-cash utilization	0.0
Adjustment for sale of the Wella Business	0.0
Effect of exchange rates	0.0
Ending balance	$ 0.9