Income Taxes - Summary of Valuation Allowance (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 20.7	$ 60.1	$ 51.8
Increases	2.8	2.6	13.3
Decreases	(0.2)	(42.0)	(5.0)
Ending balance	$ 23.3	$ 20.7	$ 60.1