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Finance Receivables - Finance Receivables (Details) - USD ($)
$ in Millions
Apr. 30, 2019
Oct. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans and Leases Receivable, Gross, Carrying Amount, Covered $ 2,341 $ 2,180
Less: Allowance for Doubtful accounts 25 22
Total finance receivables, net 2,316 2,158
Financing Receivable, Recorded Investment, Current [1] 2,037 1,898
Finance Receivables, Noncurrent 279 260
Loans and Leases Receivable, Gross 2,341 2,180
Retail Portfolio [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans and Leases Receivable, Gross, Carrying Amount, Covered 797 720
Wholesale Portfolio [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans and Leases Receivable, Gross, Carrying Amount, Covered $ 1,544 $ 1,460
[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.