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Basis of Presentation and Significant Accounting Policies - Foreign Currency Translation and Remeasurement (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
Basis of Presentation and Significant Accounting Policies      
Foreign currency gains/losses net of losses/gains $ 0.3 $ 0.8 $ 0.3
Fixed rate long term obligation fair value $ 6.2 $ 0.4