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STOCK PROGRAMS - Stock Program Details (Details)
shares in Millions, $ in Millions
12 Months Ended
Jun. 30, 2018
USD ($)
item
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award      
Number of active equity compensation plans | item 2    
Compensation expense      
Compensation expense $ 236 $ 219 $ 184
Income tax benefit 49 $ 72 $ 60
Total unrecognized compensation cost related to unvested stock-based awards $ 150    
Weighted-average period over which compensation cost related to unvested stock-based awards is expected to be recognized 2 years    
Common Class A      
Share-based Compensation Arrangement by Share-based Payment Award      
Number of Class A Common Stock shares authorized under active equity compensation plans | shares 76.8    
Number of Class A Common Stock shares reserved and available to be granted pursuant to equity compensation plans | shares 8.5