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EQUITY INVESTMENTS - Summary of Significant Unobservable Inputs Used in Level 3 Valuation (Details) - Wella Business $ in Millions | Jun. 30, 2021 USD ($) | Nov. 30, 2020 USD ($)
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Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments at fair value | $ 1,260.0 | $ 1,634.5
Level 3 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments at fair value | $ 1,260.0 |
Level 3 | Discount rate | Discounted cash flows |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Unobservable input | 0.1100 |
Level 3 | Growth rate | Discounted cash flows | Minimum |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Unobservable input | 0.015 |
Level 3 | Growth rate | Discounted cash flows | Maximum |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Unobservable input | 0.042 |
Level 3 | Revenue multiple | Market multiple |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Unobservable input | 2.0 |
Level 3 | EBITDA multiple | Market multiple | Minimum |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Unobservable input | 12.5 |
Level 3 | EBITDA multiple | Market multiple | Maximum |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Unobservable input | 15.5 |

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