Basis of Presentation and Significant Accounting Policies Deferred Income Tax (Details) - USD ($) $ in Millions	Apr. 30, 2016	Oct. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Deferred income tax asset, net (noncurrent)	$ 26.5	$ 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
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