Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details)

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2014
Mar. 31, 2020
Jun. 30, 2019
Dec. 31, 2014
Dec. 31, 2014
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Mar. 31, 2019
Nov. 30, 2014
Derivative                    
Net unrealized gains (losses) arising during the period           $ (16,739,000) $ (9,119,000) $ (1,934,000)    
Reclassification adjustments for net gains or losses included in net income           2,072,000 4,018,000 3,846,000    
Unamortized portion of the fair value of derivative contracts           21,300,000        
Senior notes                    
Derivative                    
Debt instrument, face amount                 $ 1,200,000,000 $ 2,500,000,000
Portion of Senior notes                    
Derivative                    
Unamortized portion of the fair value of derivative contracts           $ 3,300,000        
Senior notes due November 1, 2024 | Senior notes                    
Derivative                    
Debt instrument, face amount $ 1,250,000,000                  
Stated interest rate 4.65%         4.65%        
Treasury Lock | Portion of Senior notes | Interest expense                    
Derivative                    
Reclassification adjustments for net gains or losses included in net income           $ 800,000 800,000 800,000    
2018 Rate Lock Agreements                    
Derivative                    
Reclassification adjustments for net gains or losses included in net income           1,200,000 $ 300,000      
Unamortized portion of the fair value of derivative contracts           $ 12,100,000        
Derivatives designated as hedging instruments | Cash flow hedge contracts- foreign currency | Treasury Lock                    
Derivative                    
Derivative, notional amount $ 1,000,000,000.00             $ 500,000,000.0    
Derivatives designated as hedging instruments | Cash flow hedge contracts- foreign currency | Treasury Lock | Maximum                    
Derivative                    
Term of contract           18 months        
Derivatives designated as hedging instruments | Senior notes | Cash flow hedge contracts- foreign currency | Treasury Lock                    
Derivative                    
Term of contract 10 years                  
Derivatives designated as hedging instruments | Senior notes | Cash flow hedge contracts- foreign currency | Treasury Lock | Portion of Senior notes                    
Derivative                    
Net unrealized gains (losses) arising during the period         $ 7,500,000          
Reclassification adjustments for net gains or losses included in net income       $ 1,000,000,000.00            
Derivatives designated as hedging instruments | Senior notes | Cash flow hedge contracts- foreign currency | Treasury Lock | 2020 Rate Lock Agreements                    
Derivative                    
Derivative, notional amount           $ 350,000,000.0        
Net unrealized gains (losses) arising during the period   $ 21,500,000                
Reclassification adjustments for net gains or losses included in net income           $ 200,000        
Derivatives designated as hedging instruments | Senior notes | Cash flow hedge contracts- foreign currency | Treasury Lock | 2018 Rate Lock Agreements                    
Derivative                    
Net unrealized gains (losses) arising during the period     $ 13,600,000              
Reclassification adjustments for net gains or losses included in net income   $ 500,000,000.0