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SHARE-BASED COMPENSATION PLANS - Series A and Series A-1 Preferred Stock Narrative (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Mar. 27, 2020
Feb. 27, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Chief Executive Officer          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock repurchased     $ 18.3    
Plan modification, incremental cost     18.3    
Series A Preferred Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment arrangement expense (income)     $ 15.8 $ (4.4) $ 0.1
Series A-1 Preferred Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock repurchased (in shares) 7.9 6.9      
Series A and Series A-1 Preferred Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Nonqualified stock options contractual life     7 years