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Allowance for Doubtful Accounts - Schedule of Impaired Finance Receivables (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Retail Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Average Recorded Investment $ 29 $ 21
Impaired finance receivables with specific loss reserves [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Recorded Investment 31 23
Impaired finance receivables with specific loss reserves [Member] | Retail Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Recorded Investment 31 23
Impaired finance receivables with specific loss reserves [Member] | Wholesale Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Recorded Investment 0 0
Impaired financing receivable without specific loss reserves [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Recorded Investment 0 1
Impaired financing receivable without specific loss reserves [Member] | Retail Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Recorded Investment 0 1
Impaired financing receivable without specific loss reserves [Member] | Wholesale Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Impaired Financing Receivable, Recorded Investment 0 0
Specific loss reserves on impaired finance receivables [Member]    
Finance Receivable, Impaired [Line Items]    
Specific loss reserves on impaired finance receivables 12 11
Specific loss reserves on impaired finance receivables [Member] | Retail Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Specific loss reserves on impaired finance receivables 12 11
Specific loss reserves on impaired finance receivables [Member] | Wholesale Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Specific loss reserves on impaired finance receivables 0 0
Finance receivable non-accrual status [Member]    
Finance Receivable, Impaired [Line Items]    
Finance receivables on non-accrual status 31 24
Finance receivable non-accrual status [Member] | Retail Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Finance receivables on non-accrual status 31 24
Finance receivable non-accrual status [Member] | Wholesale Portfolio [Member]    
Finance Receivable, Impaired [Line Items]    
Finance receivables on non-accrual status $ 0 $ 0