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Accounting for Leases as a Lessor - Components of Financing Receivables (Details) - USD ($)
$ in Millions
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Leases [Abstract]        
Minimum lease payments receivable $ 9,526 $ 9,448    
Unguaranteed residual value 390 364    
Unearned income (718) (754)    
Financing receivables, gross 9,198 9,058    
Allowance for credit losses (228) (154) $ (131) $ (120)
Financing receivables, net 8,970 8,904    
Less: current portion (3,932) (3,794)    
Amounts due after one year, net $ 5,038 $ 5,110