Finance Receivables - Finance Receivables (Details) - USD ($) $ in Millions	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	$ 1,958
Loans and Leases Receivable, Gross, Carrying Amount, Covered	2,220	$ 2,180
Less: Allowance for Doubtful accounts	23	22
Total finance receivables, net	2,197	2,158
Financing Receivable, Recorded Investment, Current	1,923	1,898
Finance Receivables, Noncurrent	274	260
Loans and Leases Receivable Due In Two Years	145
Loans and Leases Receivable Due In Three Years	104
Loans and Leases Receivable Due In Four Years	49
Loans and Leases Receivable Due In Five Years	15
Loans and Leases Receivable Due Thereafter	4
Finance Receivables Gross	2,275
Loans and Leases Receivable, Gross	2,220		$ 2,180
Loans and Leases Receivable, Deferred Income	55
Retail Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	592
Loans and Leases Receivable, Gross, Carrying Amount, Covered	854	720
Loans and Leases Receivable Due In Two Years	145
Loans and Leases Receivable Due In Three Years	104
Loans and Leases Receivable Due In Four Years	49
Loans and Leases Receivable Due In Five Years	15
Loans and Leases Receivable Due Thereafter	4
Finance Receivables Gross	909
Loans and Leases Receivable, Gross	854
Loans and Leases Receivable, Deferred Income	55
Wholesale Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	1,366
Loans and Leases Receivable, Gross, Carrying Amount, Covered	1,366	$ 1,460
Loans and Leases Receivable Due In Two Years	0
Loans and Leases Receivable Due In Three Years	0
Loans and Leases Receivable Due In Four Years	0
Loans and Leases Receivable Due In Five Years	0
Loans and Leases Receivable Due Thereafter	0
Finance Receivables Gross	1,366
Loans and Leases Receivable, Gross	1,366
Loans and Leases Receivable, Deferred Income	$ 0