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POST-RETIREMENT BENEFIT PLANS - Amounts Recognized in Consolidated Financial Statements - Changes in Accumulated Other Comprehensive (Income) or Loss (Details) - USD ($) $ in Millions | 11 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Oct. 31, 2024
Defined Benefit Plan, Changes in Accumulated Other Comprehensive (Income) Loss [Roll Forward] |  |
Accumulated other comprehensive loss at beginning of year | $ 114.3 | $ 109.2
Increase or (decrease) in accumulated other comprehensive loss |  |
Net prior service cost amortized | 0.1 | 0.3
Net (gain) loss amortized | (0.5) | 0.9
Liability (gain) loss | (11.8) | 52.8
Asset gain | (3.1) | (53.5)
Other adjustments | 0.0 | 0.3
(Decrease) increase in accumulated other comprehensive loss | (15.3) | 0.8
Foreign currency impact | 2.6 | 4.3
Accumulated other comprehensive loss at year end | $ 101.6 | $ 114.3

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