Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Millions, $ 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, 2019		66.6
Balance, beginning of period at Oct. 31, 2019		$ 0.7	$ 708.9	$ (23.9)	$ 856.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans (in shares)		0.2
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans, net		$ 0.0	0.0
Repurchase of common stock (in shares)		(0.2)
Repurchase of common stock		$ 0.0	(5.1)
Share-based compensation expense			11.1
Other comprehensive income (loss)				(6.2)
Net (loss) income	$ (52.8)				(52.8)
Dividends
Common stock ($0.190, $0.185, $0.570, and $0.555 per share)					(37.0)
Stock issued under share-based compensation plans					(0.6)
Balance, end of period (in shares) at Jul. 31, 2020		66.7
Balance, end of period at Jul. 31, 2020	1,451.3	$ 0.7	714.9	(30.1)	765.9
Balance, beginning of period (in shares) at Apr. 30, 2020		66.6
Balance, beginning of period at Apr. 30, 2020		$ 0.7	707.1	(34.9)	722.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans (in shares)		0.0
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans, net		$ 0.0	0.9
Repurchase of common stock (in shares)		0.0
Repurchase of common stock		$ 0.0	0.0
Share-based compensation expense			6.9
Other comprehensive income (loss)				4.8
Net (loss) income	56.0				56.0
Dividends
Common stock ($0.190, $0.185, $0.570, and $0.555 per share)					(12.3)
Stock issued under share-based compensation plans					(0.1)
Balance, end of period (in shares) at Jul. 31, 2020		66.7
Balance, end of period at Jul. 31, 2020	1,451.3	$ 0.7	714.9	(30.1)	765.9
Balance, beginning of period (in shares) at Oct. 31, 2020		66.7
Balance, beginning of period at Oct. 31, 2020	1,500.3	$ 0.7	724.1	(30.8)	806.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans (in shares)		0.5
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans, net		$ 0.0	(6.5)
Repurchase of common stock (in shares)		0.0
Repurchase of common stock		$ 0.0	0.0
Share-based compensation expense			26.0
Other comprehensive income (loss)				7.8
Net (loss) income	92.0				92.0
Dividends
Common stock ($0.190, $0.185, $0.570, and $0.555 per share)					(38.2)
Stock issued under share-based compensation plans					(1.3)
Balance, end of period (in shares) at Jul. 31, 2021		67.2
Balance, end of period at Jul. 31, 2021	1,580.3	$ 0.7	743.6	(22.9)	859.0
Balance, beginning of period (in shares) at Apr. 30, 2021		67.1
Balance, beginning of period at Apr. 30, 2021		$ 0.7	737.1	(23.6)	885.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans (in shares)		0.1
(Taxes withheld) stock issued under employee stock purchase and share-based compensation plans, net		$ 0.0	(2.0)
Repurchase of common stock (in shares)		0.0
Repurchase of common stock		$ 0.0	0.0
Share-based compensation expense			8.4
Other comprehensive income (loss)				0.7
Net (loss) income	(13.7)				(13.7)
Dividends
Common stock ($0.190, $0.185, $0.570, and $0.555 per share)					(12.8)
Stock issued under share-based compensation plans					(0.2)
Balance, end of period (in shares) at Jul. 31, 2021		67.2
Balance, end of period at Jul. 31, 2021	$ 1,580.3	$ 0.7	$ 743.6	$ (22.9)	$ 859.0