CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss, Net of Taxes	Retained Earnings
Balance, beginning of period (in shares) at Oct. 31, 2020		66,700,000
Balance, beginning of period at Oct. 31, 2020		$ 0.7	$ 724.1	$ (30.8)	$ 806.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		400,000
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans, net		$ 0.0	(4.6)
Repurchase of common stock (in shares)	0	0
Repurchase of common stock		$ 0.0	0.0
Share-based compensation expense			17.6
Other comprehensive (loss) income				7.2
Net income	$ 105.7				105.7
Dividends
Common stock ($0.195, $0.190, $0.390, and $0.380 per share)					(25.4)
Stock issued under share-based compensation plans					(1.0)
Balance, end of period (in shares) at Apr. 30, 2021		67,100,000
Balance, end of period at Apr. 30, 2021	1,599.8	$ 0.7	737.1	(23.6)	885.6
Balance, beginning of period (in shares) at Jan. 31, 2021		67,100,000
Balance, beginning of period at Jan. 31, 2021		$ 0.7	726.9	(25.9)	867.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans, net		$ 0.0	1.1
Repurchase of common stock (in shares)		0
Repurchase of common stock		$ 0.0	0.0
Share-based compensation expense			9.1
Other comprehensive (loss) income				2.3
Net income	31.1				31.1
Dividends
Common stock ($0.195, $0.190, $0.390, and $0.380 per share)					(12.7)
Stock issued under share-based compensation plans					(0.2)
Balance, end of period (in shares) at Apr. 30, 2021		67,100,000
Balance, end of period at Apr. 30, 2021	1,599.8	$ 0.7	737.1	(23.6)	885.6
Balance, beginning of period (in shares) at Oct. 31, 2021		67,300,000
Balance, beginning of period at Oct. 31, 2021	$ 1,609.2	$ 0.7	750.9	(22.5)	880.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		500,000
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans, net		$ 0.0	(8.1)
Repurchase of common stock (in shares)	(1,000,000.0)	(1,000,000.0)
Repurchase of common stock	$ (43.3)	$ 0.0	(43.3)
Share-based compensation expense			16.8
Other comprehensive (loss) income				(2.6)
Net income	124.8				124.8
Dividends
Common stock ($0.195, $0.190, $0.390, and $0.380 per share)					(26.2)
Stock issued under share-based compensation plans					(1.1)
Balance, end of period (in shares) at Apr. 30, 2022		66,800,000
Balance, end of period at Apr. 30, 2022	$ 1,669.6	$ 0.7	716.4	(25.2)	977.7
Balance, beginning of period (in shares) at Jan. 31, 2022		67,400,000
Balance, beginning of period at Jan. 31, 2022		$ 0.7	737.0	(24.6)	942.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans, net		$ 0.0	1.0
Repurchase of common stock (in shares)	(700,000)	(700,000)
Repurchase of common stock	$ (30.0)	$ 0.0	(30.0)
Share-based compensation expense			8.4
Other comprehensive (loss) income				(0.6)
Net income	48.8				48.8
Dividends
Common stock ($0.195, $0.190, $0.390, and $0.380 per share)					(13.0)
Stock issued under share-based compensation plans					(0.2)
Balance, end of period (in shares) at Apr. 30, 2022		66,800,000
Balance, end of period at Apr. 30, 2022	$ 1,669.6	$ 0.7	$ 716.4	$ (25.2)	$ 977.7