Allowance for Doubtful Accounts - Schedule of Allowance Aging Analysis (Details) - USD ($) $ in Millions	Jul. 31, 2018	Oct. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	$ 1,860	$ 1,768
30-90 days past due	45	22
Total finance receivables	1,921	1,805
Retail Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	579	524
30-90 days past due	44	21
Total finance receivables	639	559
Wholesale Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Finance Receivables, Current	1,281	1,244
30-90 days past due	1	1
Total finance receivables	1,282	1,246
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Over 90 days past due	16	15
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Retail Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Over 90 days past due	16	14
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Wholesale Portfolio [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Over 90 days past due	$ 0	$ 1