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Commitments and Contingencies (Details) $ in Millions	8 Months Ended	12 Months Ended
Commitments and Contingencies (Details) $ in Millions	Oct. 31, 2015 complaint	Oct. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Rent expense		$ 29.9	$ 27.5	$ 25.6
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016		27.4
2017		23.7
2018		21.5
2019		19.2
2020		16.4
2022 and thereafter		124.8
Total		233.0
Payments for Legal Settlements		$ 17.0
Loss Contingency, New Claims Filed, Number \| complaint	50