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Receivables (Details 4)
$ in Millions
6 Months Ended
Apr. 30, 2016
USD ($)
item
Apr. 30, 2015
USD ($)
item
Receivables Related to Troubled Debt Restructurings    
Receivable contracts in troubled debt restructuring, number | item 44 50
Receivables in troubled debt restructurings, aggregate balances, pre-modification $ 1.2 $ 1.5
Receivables in troubled debt restructurings, aggregate balances, post-modification $ 0.7 $ 1.1