Allowance for Credit Losses and Credit Quality of Receivables - Troubled Debt Restructurings (Details) $ in Millions	12 Months Ended
	Oct. 31, 2016 USD ($) item	Oct. 31, 2015 USD ($) item	Oct. 31, 2014 USD ($) item
Receivables Related to Troubled Debt Restructurings
Receivable contracts in troubled debt restructuring, number | item	150	106	66
Receivables in troubled debt restructurings, aggregate balances, pre-modification	$ 5.0	$ 3.1	$ 2.6
Receivables in troubled debt restructurings, aggregate balances, post-modification	$ 4.0	$ 2.4	$ 2.2
Number of troubled debt restructurings that subsequently defaulted | item	0	0	0
Commitments to lend additional funds to borrowers whose accounts were modified in troubled debt restructurings	$ 0.0