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REVENUE RECOGNITION - Changes in Allowance for Credit Losses (Details)
$ in Millions
9 Months Ended
Mar. 31, 2021
USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]  
Balance at June 30, 2020 $ 36
Adjustment for expected credit losses (5)
Write-offs, net & other (10)
Balance at March 31, 2021 25
Cumulative Effect, Period of Adoption, Adjustment  
Accounts Receivable, Allowance for Credit Loss [Roll Forward]  
Balance at June 30, 2020 $ 4