Allowance for Doubtful Accounts - Aging Analysis (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2014	Oct. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	$ 1,730	$ 1,903
30-90 days past due	44	46
Over 90 days past due	14	9
Total finance receivables	1,788	1,958
Retail Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	686	699
30-90 days past due	40	44
Over 90 days past due	13	8
Total finance receivables	739	751
Wholesale Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	1,044	1,204
30-90 days past due	4	2
Over 90 days past due	1	1
Total finance receivables	$ 1,049	$ 1,207