Condensed Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Cash flows from operating activities:
Net income	$ 197.9	$ 0.7
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	13.0	13.4
Stock-based compensation expense	5.9	7.5
Deferred income taxes	1.7	0.7
Impairment charges	12.6
(Gain) Loss on sale of business	(259.0)	1.1
Other non-cash adjustments	0.9	1.1
Changes in operating assets and liabilities, net	(2.6)	(16.3)
Net cash (used in) provided by operating activities	(29.6)	8.2
Cash flows from investing activities:
Purchase of property, plant and equipment	(16.4)	(10.6)
Proceeds from sale of business	318.2	0.6
Other investing activities	0.1	1.1
Net cash provided by (used in) investing activities	301.9	(8.9)
Cash flows from financing activities:
Net proceeds from borrowings on revolving credit facility	70.0
Payment of dividends	(185.5)	(6.1)
Repurchase and retirement of common stock	(126.1)	0.0
Other financing activities	(13.8)	(4.6)
Net cash used in financing activities	(255.4)	(10.7)
Net increase (decrease) in cash and cash equivalents	16.9	(11.4)
Cash and cash equivalents, beginning of period	21.3	20.4
Cash and cash equivalents, end of period	38.2	9.0
Supplemental Cash Flow Information [Abstract]
Interest	11.3	12.4
Income taxes, net of refunds	$ 42.5	$ 0.6