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EQUITY INVESTMENTS - Summary of Movement in Equity Investments (Details) - Wella Business
$ in Millions
9 Months Ended
Mar. 31, 2021
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance as of June 30, 2020 $ 0.0
Initial investment 1,186.5
Total gains/(losses) included in earnings - unrealized 63.5
Balance as of March 31, 2021 $ 1,250.0