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REVENUE RECOGNITION - Additional Information (Details) - USD ($)
$ in Millions
 6 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Significant changes in deferred revenue    
Balance at the beginning of the period $ 361  
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (243)  
Revenue deferred during the period 307  
Balance at the end of the period 425  
ASU 2014-09    
REVENUE RECOGNITION    
Allowance for doubtful accounts and customer deductions $ 35 $ 32