XML 52 R61.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Accounting for Leases as a Lessor - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Leases [Abstract]    
Financing receivable term, low end of range 2 years  
Financing receivable term, high end of range 5 years  
Financing receivable sold $ 38 $ 48