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FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - Common Stock - USD ($) shares in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 28, 2019 | Sep. 30, 2021 | Sep. 30, 2020
Global Auto Care |  |  |
Fair Value Of Financial Instruments [Line Items] |  |  |
Stock consideration (in shares) | 5.3 |  |
Stock consideration, value | $ 242.1 |  |
Energizer |  |  |
Fair Value Of Financial Instruments [Line Items] |  |  |
Stock consideration (in shares) |  |  | 3.6
Stock consideration, including discontinued operations (in shares) |  | 1.7 |
Cash proceeds, stock consideration |  | $ 73.1 | $ 147.1
Shares of common stock held (in shares) |  | 0.0 |

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