Finance Receivables - Finance Receivables (Details) - USD ($) $ in Millions	Oct. 31, 2020	Oct. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	$ 1,409
Loans and Leases Receivable, Gross, Carrying Amount, Covered	1,647	$ 2,220
Less: Allowance for Doubtful accounts	25	23
Total finance receivables, net	1,622	2,197
Financing Receivable, Not Past Due	1,371	1,923
Finance Receivables, Noncurrent	251	274
Loans and Leases Receivable Due In Two Years	133
Loans and Leases Receivable Due In Three Years	87
Loans and Leases Receivable Due In Four Years	49
Loans and Leases Receivable Due In Five Years	19
Loans and Leases Receivable Due Thereafter	4
Finance Receivables Gross	1,701
Loans and Leases Receivable, Gross	1,647	2,220
Loans and Leases Receivable, Deferred Income	54
Retail Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	384
Loans and Leases Receivable, Gross, Carrying Amount, Covered	622	854
Loans and Leases Receivable Due In Two Years	133
Loans and Leases Receivable Due In Three Years	87
Loans and Leases Receivable Due In Four Years	49
Loans and Leases Receivable Due In Five Years	19
Loans and Leases Receivable Due Thereafter	4
Finance Receivables Gross	676
Loans and Leases Receivable, Gross	622
Loans and Leases Receivable, Deferred Income	54
Wholesale Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable Due In One Year	1,025
Loans and Leases Receivable, Gross, Carrying Amount, Covered	1,025	$ 1,366
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	1,025
Loans and Leases Receivable, Gross	1,025
Loans and Leases Receivable, Deferred Income	$ 0