XML 190 R162.htm IDEA: XBRL DOCUMENT v3.20.2
SHARE-BASED COMPENSATION PLANS - Phantom Units (Details)
$ in Millions
12 Months Ended
Jul. 24, 2015
USD ($)
Jul. 21, 2015
USD ($)
shares
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2016
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 42.2 $ 11.7 $ 30.4  
Former CEO | Phantom Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares) | shares   300,000        
Phantom units value   $ 8.1        
Share-based compensation expense           $ 8.0
Former CEO | Phantom Units | Common Class A            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Phantom units value $ 8.0          
Share equivalent of Class A Common Stock   1