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FAIR VALUE MEASUREMENTS - Changes in the Fair Value of the Contingent Consideration Obligations (Details) - USD ($)
$ in Millions
6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Changes in the fair value of the contingent consideration obligations    
Changes in fair value $ (7) $ (9)
Selling, general and administrative expenses    
Changes in the fair value of the contingent consideration obligations    
Contingent consideration at the beginning of the period 36  
Changes in fair value (7)  
Contingent consideration at the end of the period $ 29