Basis of Presentation and Significant Accounting Policies - Accounting Pronouncements Early Adopted (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Benefit within income tax provision	$ 2.2
Deferred income tax liability, net (noncurrent)	3.5	$ 0.0
Deferred income tax asset, net (noncurrent)	$ 37.4	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	$ 0.04
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-17
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
Previously Reported | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2015-17
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 | Accounting Standards Update 2015-17
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