Finance Receivables - Finance Receivables (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2015		Oct. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 2,182		$ 2,065
Less: Allowance for Doubtful accounts	28		27
Total finance receivables, net	2,154		2,038
Financing Receivable, Recorded Investment, Current	1,929	[1]	1,758	[1]
Finance Receivables, Noncurrent	225		280
Retail Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	667		726
Wholesale Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 1,515		$ 1,339

[1] The current portion of finance receivables is computed based on contractual maturities. Actual cash collections typically vary from the contractual cash flows because of prepayments, extensions, delinquencies, credit losses, and renewals.