Finance Receivables - Finance Receivables (Details) - USD ($) $ in Millions	Oct. 31, 2017	Oct. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	$ 1,593
Loans and Leases Receivable, Gross, Carrying Amount, Covered	1,805	$ 1,698
Less: Allowance for Doubtful accounts	20	21
Total finance receivables, net	1,785	1,677
Financing Receivable, Recorded Investment, Current	1,565	1,457
Finance Receivables, Noncurrent	220	220
Loans and Leases Receivable Due In Two Years	114
Loans and Leases Receivable Due In Three Years	80
Loans and Leases Receivable Due In Four Years	43
Loans and Leases Receivable Due In Five Years	18
Loans and Leases Receivable Due Thereafter	1
Finance Receivables Gross	1,849
Loans and Leases Receivable, Gross	1,805
Loans and Leases Receivable, Deferred Income	44
Retail Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	347
Loans and Leases Receivable, Gross, Carrying Amount, Covered	559	499
Loans and Leases Receivable Due In Two Years	114
Loans and Leases Receivable Due In Three Years	80
Loans and Leases Receivable Due In Four Years	43
Loans and Leases Receivable Due In Five Years	18
Loans and Leases Receivable Due Thereafter	1
Finance Receivables Gross	603
Loans and Leases Receivable, Gross	559
Loans and Leases Receivable, Deferred Income	44
Wholesale Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	1,246
Loans and Leases Receivable, Gross, Carrying Amount, Covered	1,246	$ 1,199
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	1,246
Loans and Leases Receivable, Gross	1,246
Loans and Leases Receivable, Deferred Income	$ 0