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SHARE-BASED COMPENSATION PLANS - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 11,400,000	$ 2,300,000	$ 17,700,000	$ 8,700,000
Stock issued during period, value, share-based compensation, forfeited	0	5,900,000	2,500,000	8,800,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	41,900,000		$ 41,900,000
Weighted-average period for unrecognized share-based compensation			3 years 10 months 20 days
Restricted and Other Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	107,000,000.0		$ 107,000,000.0
Weighted-average period for unrecognized share-based compensation			3 years 9 months 25 days
Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 8,000,000.0	3,600,000	$ 13,000,000.0	7,700,000
Awards granted (in shares)	5,300,000		5,300,000
Non-Qualified Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 2,900,000	2,800,000	$ 3,700,000	5,200,000
Options granted (in shares)	2,200,000		2,200,000
Series A and A-1 Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	$ 8,100,000		$ 8,100,000
Weighted-average period for unrecognized share-based compensation			3 years 11 months 8 days
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 500,000	(4,100,000)	$ 1,000,000.0	(4,200,000)
Awards granted (in shares)	0		0
Series A-1 Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	0		0
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense	$ 11,400,000	$ 8,200,000	$ 20,200,000	$ 17,500,000