Finance Receivables - Finance Receivables (Details) - USD ($) $ in Millions		Jul. 31, 2018	Oct. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered		$ 1,921	$ 1,805
Less: Allowance for Doubtful accounts		24	20
Total finance receivables, net		1,897	1,785
Financing Receivable, Recorded Investment, Current	[1]	1,638	1,565
Finance Receivables, Noncurrent		259	220
Loans and Leases Receivable, Gross		1,921	1,805
Retail Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered		639	559
Wholesale Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered		$ 1,282	$ 1,246

[1] (A)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.