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STOCK-BASED COMPENSATION PLANS (Summary of Restricted Stock Award Activity) (Details) - Restricted Stock [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of shares vested $ 5 $ 1 $ 1
Number of Shares      
Outstanding, beginning balance (in shares) 156    
Granted (in shares) 139    
Vested (in shares) (36)    
Forfeited (in shares) (18)    
Outstanding, ending balance (in shares) 241 156  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Outstanding, beginning balance (in dollars per share) $ 135    
Granted (in dollars per share) 152.12 $ 135.29 $ 131.67
Vested (in dollars per share) 135    
Forfeited (in dollars per share) 140    
Outstanding, ending balance (in dollars per share) $ 144 $ 135