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LONG-TERM DEBT - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
May 30, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2020
Oct. 31, 2019
Jan. 16, 2014
Debt Instrument [Line Items]                
Long-term debt   $ 3,622,500,000   $ 3,622,500,000   $ 4,227,500,000    
Repayment of long-term debt       605,000,000 $ 5,000,000      
Revolver | Line of Credit                
Debt Instrument [Line Items]                
Interest expense   600,000 $ 600,000 3,600,000 600,000      
Credit agreement, maximum capacity   750,000,000   750,000,000     $ 450,000,000  
Long-term debt   0   $ 0   600,000,000    
Repayment of long-term debt   $ 600,000,000            
Proceeds from lines of credit     750,000,000          
Revolver | Line of Credit | LIBOR | Minimum                
Debt Instrument [Line Items]                
Interest addition to floating rate       1.25%        
Revolver | Line of Credit | LIBOR | Maximum                
Debt Instrument [Line Items]                
Interest addition to floating rate       1.75%        
Term Loan B                
Debt Instrument [Line Items]                
Debt instrument face amount $ 1,000,000,000             $ 800,000,000
Proceeds from issuance of debt $ 1,000,000,000              
Term loan period       7 years        
Term loan quarterly repayment as percentage of principal       0.25%        
Effective interest rate percentage   1.90%   1.90%        
Leverage ratio, compliance maximum   4   4        
Leverage ratio   1.6   1.6        
Interest expense   $ 4,700,000 $ 9,000,000.0 $ 9,500,000 $ 19,100,000      
Long-term debt   $ 972,500,000   $ 972,500,000   $ 977,500,000    
Term Loan B | LIBOR                
Debt Instrument [Line Items]                
Interest addition to floating rate       1.75%