Finance Receivables - Finance Receivables (Details) - USD ($) $ in Millions		Jul. 31, 2020	Oct. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered		$ 1,678	$ 2,220
Less: Allowance for Doubtful accounts		25	23
Total finance receivables, net		1,653	2,197
Financing Receivable, Not Past Due	[1]	1,403	1,923
Finance Receivables, Noncurrent		250	274
Loans and Leases Receivable, Gross		1,678	2,220
Retail Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered		550	854
Wholesale Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered		$ 1,128	$ 1,366

[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.