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GOODWILL AND INTANGIBLE ASSETS, NET - Schedule of Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Sep. 30, 2023
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Indefinite-lived Intangible Assets [Line Items] |  |
Total indefinite-lived intangible assets | $ 323.9 | $ 323.9
Total intangible assets, net | 418.8 | 436.7
Intangible Assets [Line Items] |  |
Total finite-lived intangible assets, net | 94.9 | 112.8
Trade names |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Total indefinite-lived intangible assets | 168.2 | 168.2
Roundup® marketing agreement amendment |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Total indefinite-lived intangible assets | 155.7 | 155.7
Trade names |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 325.8 | 322.4
Accumulated Amortization/ Impairment Charges | (272.8) | (260.7)
Total finite-lived intangible assets, net | 53.0 | 61.7
Customer relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 253.1 | 251.5
Accumulated Amortization/ Impairment Charges | (223.9) | (216.1)
Total finite-lived intangible assets, net | 29.2 | 35.4
Technology |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 50.2 | 50.1
Accumulated Amortization/ Impairment Charges | (45.5) | (44.5)
Total finite-lived intangible assets, net | 4.7 | 5.6
Other |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 35.0 | 34.9
Accumulated Amortization/ Impairment Charges | (27.0) | (24.8)
Total finite-lived intangible assets, net | $ 8.0 | $ 10.1

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