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LONG-TERM DEBT - Senior Unsecured Fixed Rate Notes (Details) - USD ($)
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Feb. 18, 2020
Dec. 20, 2016
May 31, 2016
Debt Instrument [Line Items]            
Long-term debt $ 4,225,000,000   $ 4,227,500,000      
Senior Notes | Senior Notes 2030            
Debt Instrument [Line Items]            
Debt instrument face amount       $ 900,000,000    
Debt instrument stated interest rate       4.125%    
Interest expense 9,200,000          
Long-term debt 900,000,000   900,000,000      
Senior Notes | Senior Notes 2028            
Debt Instrument [Line Items]            
Debt instrument face amount       $ 900,000,000    
Debt instrument stated interest rate       3.875%    
Interest expense 8,600,000          
Long-term debt 900,000,000   900,000,000      
Senior Notes | Senior Notes 2026            
Debt Instrument [Line Items]            
Debt instrument face amount         $ 250,000,000 $ 600,000,000
Debt instrument stated interest rate           5.875%
Interest expense 12,500,000 $ 12,500,000        
Debt premium issue price percentage         102.75%  
Long-term debt $ 850,000,000   $ 850,000,000