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EQUITY, LONG-TERM INCENTIVE COMPENSATION PLANS AND NON-CONTROLLING INTEREST - Cash-Based Long-Term Incentive Compensation (Details) - Cash long-term incentive plan $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2021 USD ($) Installment | Mar. 31, 2020 USD ($)
Cash Long-Term Incentive Plan |  |  |  |
Cash-based long-term incentive plan, authorized amount |  |  | $ 9.4 | $ 6.0
Cash long-term incentive plan, compensation expense | $ 17.7 | $ 14.7 | 54.4 | $ 45.4
Cash long-term incentive plan, unrecognized compensation balance | $ 123.5 |  | $ 123.5 |
Minimum |  |  |  |
Cash Long-Term Incentive Plan |  |  |  |
Cash long-term incentive plan, equal vesting installments | Installment |  |  | 3 |
Cash long-term incentive plan, vesting period |  |  | 3 years |
Cash long-term incentive plan, percentage of equal vesting installments |  |  | 33.33% |
Maximum |  |  |  |
Cash Long-Term Incentive Plan |  |  |  |
Cash long-term incentive plan, equal vesting installments | Installment |  |  | 4 |
Cash long-term incentive plan, vesting period |  |  | 4 years |
Cash long-term incentive plan, percentage of equal vesting installments |  |  | 25.00% |

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