Basis of Presentation and Significant Accounting Policies Deferred Income Tax (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Jul. 31, 2016	Jul. 31, 2016	Oct. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Benefit within income tax provision	$ 1.8	$ 1.8
Deferred income tax asset, net (noncurrent)	$ 32.7	$ 32.7	$ 34.1
New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (current)			0.0
Deferred income tax liability, net (noncurrent)			0.0
Deferred income tax asset, net (noncurrent)			34.1
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09
New Accounting Pronouncement, Early Adoption [Line Items]
Effect on diluted earnings per share, related to tax benefits		$ 0.03
Previously Reported | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (current)			53.2
Deferred income tax liability, net (noncurrent)			19.1
Deferred income tax asset, net (noncurrent)			0.0
Restatement Adjustment | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (current)			(53.2)
Deferred income tax liability, net (noncurrent)			(19.1)
Deferred income tax asset, net (noncurrent)			$ 34.1