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SHARE-BASED COMPENSATION PLANS - Nonqualified Stock Options Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding, beginning balance (in shares) 3.4 3.6  
Intrinsic value of options exercised $ 0.0 $ 1.2 $ 0.1
Share-based compensation expense $ 53.0 91.8 137.6
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding options grant price (in dollars per share) $ 11.08    
Exercisable options grant price (in dollars per share) 11.08    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding options grant price (in dollars per share) 18.55    
Exercisable options grant price (in dollars per share) $ 18.55    
Nonqualified Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
Nonqualified stock options contractual life (in years) 10 years    
Share-based compensation expense $ 0.1 $ 0.3 $ 1.3
Nonqualified Options | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 1.6    
Nonqualified Options | Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 1.8    
Nonqualified Options | Tranche Two, Subtranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Award vesting rights, percentage 60.00%    
Nonqualified Options | Tranche Two, Subtranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Award vesting rights, percentage 20.00%    
Nonqualified Options | Tranche Two, Subtranche Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
Award vesting rights, percentage 20.00%