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Intangible Assets (Narrative) (Details)
6 Months Ended
Apr. 30, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill, Impairment Loss $ 0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2017 66,700,000
2018 64,500,000
2019 62,100,000
2020 52,200,000
2021 $ 50,700,000