Consolidated Statements of Stockholders' Equity - 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, 2015		56.1
Balance, beginning of year at Oct. 31, 2015		$ 0.6	$ 275.5	$ (5.1)	$ 736.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in GCA acquisition, net of shares withheld for taxes (in shares)		0.0
Stock issued in GCA acquisition, net of shares withheld for taxes		$ 0.0	0.0
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.9
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans		$ 0.0	5.7
Repurchase of common stock (in shares)	(1.4)	(1.4)
Repurchase of common stock	$ (46.6)	$ 0.0	(46.6)
Share-based compensation expense			14.0
Other comprehensive income (loss)				(26.5)
Net income	57.2				57.2
Dividends
Common stock					(36.9)
Stock issued under share-based compensation plans					(0.4)
Balance, end of year (in shares) at Oct. 31, 2016		55.6
Balance, end of year at Oct. 31, 2016	$ 974.0	$ 0.6	248.6	(31.6)	756.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in GCA acquisition, net of shares withheld for taxes (in shares)		9.4
Stock issued in GCA acquisition, net of shares withheld for taxes		$ 0.1	421.2
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.7
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans		$ 0.0	(0.1)
Repurchase of common stock (in shares)	(0.2)	(0.2)
Repurchase of common stock	$ (7.9)	$ 0.0	(7.9)
Share-based compensation expense			13.3
Other comprehensive income (loss)				11.3
Net income	3.8				3.8
Dividends
Common stock					(39.5)
Stock issued under share-based compensation plans					(0.6)
Balance, end of year (in shares) at Oct. 31, 2017		65.5
Balance, end of year at Oct. 31, 2017	$ 1,375.7	$ 0.7	675.2	(20.3)	720.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued in GCA acquisition, net of shares withheld for taxes (in shares)		0.0
Stock issued in GCA acquisition, net of shares withheld for taxes		$ 0.0	0.0
Stock issued under employee stock purchase and share-based compensation plans (in shares)		0.5
Stock issued (taxes withheld) under employee stock purchase and share-based compensation plans		$ 0.0	(0.4)
Repurchase of common stock (in shares)	0.0	0.0
Repurchase of common stock	$ 0.0	$ 0.0	0.0
Share-based compensation expense			17.0
Other comprehensive income (loss)				11.3
Net income	97.8				97.8
Dividends
Common stock					(46.0)
Stock issued under share-based compensation plans					(0.6)
Balance, end of year (in shares) at Oct. 31, 2018		66.0
Balance, end of year at Oct. 31, 2018	$ 1,454.6	$ 0.7	$ 691.8	$ (9.0)	$ 771.2