SHARE-BASED COMPENSATION PLANS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 6.3	$ 6.4
Stock issued during period, value, share-based compensation, forfeited	2.5	2.9
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	$ 39.9
Weighted-average period for unrecognized share-based compensation	4 years
Restricted and Other Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	$ 72.3
Weighted-average period for unrecognized share-based compensation	3 years 3 months 10 days
Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 5.0	4.1
Awards granted (in shares)	0
Non-Qualified Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 0.8	2.4
Options granted (in shares)	0
Series A and A-1 Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	$ 8.6
Weighted-average period for unrecognized share-based compensation	4 years 2 months 8 days
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 0.5	(0.1)
Awards granted (in shares)	0
Series A-1 Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	0
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 8.8	$ 9.3