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FAIR VALUE MEASUREMENTS - Contingent Consideration Roll forward (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Business Combination, Contingent Consideration [Roll Forward]      
Changes in fair value $ (2) $ (17) $ (37)
Selling, general and administrative expenses      
Business Combination, Contingent Consideration [Roll Forward]      
Contingent consideration at June 30, 2020 4    
Payments (2)    
Changes in fair value (2)    
Contingent consideration at June 30, 2021 $ 0 $ 4