Allowance for Doubtful Accounts - Schedule of Allowance Aging Analysis (Details) - USD ($) $ in Millions	Jul. 31, 2015	Oct. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	$ 1,900	$ 1,976
30-90 days past due	60	66
Over 90 days past due	18	23
Total finance receivables	1,978	2,065
Retail Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	531	643
30-90 days past due	58	64
Over 90 days past due	17	19
Total finance receivables	606	726
Wholesale Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	1,369	1,333
30-90 days past due	2	2
Over 90 days past due	1	4
Total finance receivables	$ 1,372	$ 1,339