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SHARE-BASED COMPENSATION PLANS - Executive Ownership Programs (Details) - shares
shares in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
EOP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares purchased during period (in shares) 1.4 2.0 0.8