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SHARE-BASED COMPENSATION PLANS - Black-Scholes Valuation Assumptions (Details) - Nonqualified Options
12 Months Ended
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected life 7 years 4 months 24 days
Risk-free interest rate 1.63%
Expected volatility 41.67%
Expected dividend yield 4.10%