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]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.2
Stock issued under employee stock purchase and share-based compensation plans	$ 0.0		(0.9)
Repurchase of common stock (in shares)		(0.2)
Repurchase of common stock	0.0		(5.1)
Share-based compensation expense (reversal)			4.2
Other comprehensive income (loss)				(11.0)
Net income (loss)	(108.8)				(108.8)
Dividends
Common stock ($0.190, $0.185, $0.380, and $0.370 per share)					(24.6)
Stock issued under share-based compensation plans					(0.5)
Balance, end of period (in shares) at Apr. 30, 2020		66.6
Balance, end of period at Apr. 30, 2020	1,395.2	$ 0.7	707.1	(34.9)	722.3
Balance, beginning of period (in shares) at Jan. 31, 2020		66.8
Balance, beginning of period at Jan. 31, 2020		$ 0.7	711.8	(24.3)	871.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.0
Stock issued under employee stock purchase and share-based compensation plans	0.0		1.1
Repurchase of common stock (in shares)		(0.2)
Repurchase of common stock	0.0		(5.1)
Share-based compensation expense (reversal)			(0.7)
Other comprehensive income (loss)				(10.5)
Net income (loss)	(136.8)				(136.8)
Dividends
Common stock ($0.190, $0.185, $0.380, and $0.370 per share)					(12.3)
Stock issued under share-based compensation plans					(0.1)
Balance, end of period (in shares) at Apr. 30, 2020		66.6
Balance, end of period at Apr. 30, 2020	1,395.2	$ 0.7	707.1	(34.9)	722.3
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]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.4
Stock issued under employee stock purchase and share-based compensation plans	0.0		(4.6)
Repurchase of common stock (in shares)		0.0
Repurchase of common stock	0.0		0.0
Share-based compensation expense (reversal)			17.6
Other comprehensive income (loss)				7.2
Net income (loss)	105.7				105.7
Dividends
Common stock ($0.190, $0.185, $0.380, and $0.370 per share)					(25.4)
Stock issued under share-based compensation plans					(1.0)
Balance, end of period (in shares) at Apr. 30, 2021		67.1
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		67.1
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)		0.0
Stock issued under employee stock purchase and share-based compensation plans	0.0		1.1
Repurchase of common stock (in shares)		0.0
Repurchase of common stock	0.0		0.0
Share-based compensation expense (reversal)			9.1
Other comprehensive income (loss)				2.3
Net income (loss)	31.1				31.1
Dividends
Common stock ($0.190, $0.185, $0.380, and $0.370 per share)					(12.7)
Stock issued under share-based compensation plans					(0.2)
Balance, end of period (in shares) at Apr. 30, 2021		67.1
Balance, end of period at Apr. 30, 2021	$ 1,599.8	$ 0.7	$ 737.1	$ (23.6)	$ 885.6