EQUITY, LONG-TERM INCENTIVE COMPENSATION PLANS AND NON-CONTROLLING INTEREST - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Millions  | 
12 Months Ended | ||||
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May 06, 2021  | 
Nov. 19, 2014  | 
Jun. 30, 2021  | 
Jun. 30, 2020  | 
Jun. 30, 2019  | 
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| Dividends Payable | |||||
| Cash dividends declared (in dollars per share) | $ 0.90 | $ 3.60 | $ 3.30 | $ 3.00 | |
| Regular cash dividend | Restricted stock unit, Performance-based and Service-based | |||||
| Dividends Payable | |||||
| Dividends payable | $ 10.3 | $ 8.3 | |||
| Regular cash dividend | Additional paid-in capital | |||||
| Dividends Payable | |||||
| Payment of dividends | $ 559.4 | $ 522.4 | |||
| Special cash dividend | |||||
| Dividends Payable | |||||
| Cash dividends declared (in dollars per share) | $ 16.50 | ||||
| Dividends payable | $ 3,000.0 | ||||
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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