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SHARE-BASED COMPENSATION PLANS - Additional Information (Details) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 74,600,000    
Number of shares available for grant (in shares) 43,900,000    
Share-based compensation expense $ 28,400,000 $ 42,200,000 $ 11,700,000
Allocated share-based compensation income (6,300,000) (6,700,000) (18,300,000)
Chief Executive Officer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense 18,300,000    
Series A and Series A-1 Preferred Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized share-based compensation expense $ 0.0    
Weighted-average period for unrecognized share-based compensation 0 years    
Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized share-based compensation expense $ 5,900,000    
Weighted-average period for unrecognized share-based compensation 2 years 5 months 23 days    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 1,000,000.0 4,600,000  
Total unrecognized share-based compensation expense $ 2,100,000    
Weighted-average period for unrecognized share-based compensation 1 year 11 months 4 days    
RSUs and Other Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized share-based compensation expense $ 319,800,000    
Weighted-average period for unrecognized share-based compensation 2 years 2 months 15 days    
Selling, general and administrative expenses      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 34,700,000 $ 48,900,000 $ 30,000,000.0