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SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Restricted cash | $ 1.6 | $ 0.0 |
Shipping and handling costs | 266.9 | 272.6 | $ 274.2
Advertising costs | 91.7 | 59.1 | 64.1
Research and development costs | $ 28.1 | 22.5 | 26.7
Percentage greater than the largest amount of recognized income tax positions which likely of being realized | 50.00% |  |
Exchange losses on foreign currency transactions | $ 7.5 | $ 5.1 | $ 14.5
Minimum |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Extended warranty, term | 1 year |  |
Maximum |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Extended warranty, term | 7 years |  |

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