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