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SHARE-BASED COMPENSATION PLANS - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 24, 2015
Jul. 21, 2015
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Selling, general and administrative expenses            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total share-based compensation expense     $ 12.4 $ (1.0) $ 29.3 $ 9.9
Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total unrecognized share-based compensation expense     5.0   $ 5.0  
Weighted-average period for unrecognized share-based compensation         2 years 26 days  
Series A Preferred Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total unrecognized share-based compensation expense     7.4   $ 7.4  
Weighted-average period for unrecognized share-based compensation         4 years 15 days  
Restricted And Other Share Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total unrecognized share-based compensation expense     41.4   $ 41.4  
Weighted-average period for unrecognized share-based compensation         2 years 8 months 9 days  
Phantom Share Units (PSUs) | Interim Chief Executive Officer            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total share-based compensation expense     $ 0.0   $ 8.0  
Granted (in shares)   300,000        
Value of phantom units   $ 8.1        
Phantom Share Units (PSUs) | Interim Chief Executive Officer | Common Class A            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Value of phantom units $ 8.0          
Number of shares common stock   1.0