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Allowance for Doubtful Accounts - Schedule of Allowance Aging Analysis (Details) - USD ($)
$ in Millions
Jan. 31, 2020
Oct. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Finance Receivables, Current $ 1,850 $ 2,118
30-90 days past due 35 77
Total finance receivables 1,908 2,220
Retail Portfolio [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Finance Receivables, Current 642 753
30-90 days past due 33 76
Total finance receivables 698 854
Wholesale Portfolio [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Finance Receivables, Current 1,208 1,365
30-90 days past due 2 1
Total finance receivables 1,210 1,366
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Over 90 days past due 23 25
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 23 25
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 $ 0