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SHARE BASED COMPENSATION - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercised (in shares) | 0 | 60,000.00 | 10,000.00
Intrinsic value of options exercised | $ 0.0 | $ 2.5 | $ 0.1
Cash settlement |  | $ 3.4 | $ 0.3
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Nonvested award, cost not yet recognized, period for recognition | 1 year 6 months |  |
Restricted Stock Units | Specturm And SB/RH |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Remaining unrecognized pre-tax compensation cost | $ 39.6 |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 2 years 3 months 18 days |  |

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