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 year (in shares) at Oct. 31, 2018		66.0
Balance, beginning of year at Oct. 31, 2018		$ 0.7	$ 691.8	$ (9.0)	$ 771.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.2
Taxes withheld under employee stock purchase and share-based compensation plans, net		$ 0.0	(2.2)
Share-based compensation expense			4.5
Other comprehensive loss				(3.2)
Net income	$ 13.0				13.0
Dividends
Common stock ($0.185 and $0.180 per share)					(11.9)
Stock issued under share-based compensation plans					(0.1)
Balance, end of year (in shares) at Jan. 31, 2019		66.2
Balance, end of year at Jan. 31, 2019	1,461.1	$ 0.7	694.1	(12.2)	778.6
Balance, beginning of year (in shares) at Oct. 31, 2019		66.6
Balance, beginning of year at Oct. 31, 2019	1,542.0	$ 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
Taxes withheld under employee stock purchase and share-based compensation plans, net		$ 0.0	(2.0)
Share-based compensation expense			4.9
Other comprehensive loss				(0.4)
Net income	28.0				28.0
Dividends
Common stock ($0.185 and $0.180 per share)					(12.3)
Stock issued under share-based compensation plans					(0.4)
Balance, end of year (in shares) at Jan. 31, 2020		66.8
Balance, end of year at Jan. 31, 2020	$ 1,559.7	$ 0.7	$ 711.8	$ (24.3)	$ 871.6