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FAIR VALUE MEASUREMENTS - Contingent Consideration Roll forward (Details) - USD ($)
$ in Millions
9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Business Combination, Contingent Consideration [Roll Forward]    
Changes in fair value of contingent consideration $ (2) $ (9)
Selling, general and administrative expenses    
Business Combination, Contingent Consideration [Roll Forward]    
Contingent consideration at June 30, 2020 4  
Changes in fair value of contingent consideration (2)  
Contingent consideration at March 31, 2021 $ 2