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Accounting for Leases as a Lessor - Lessor Activity Included in Income Statement (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Leases [Abstract]      
Interest income $ 494 $ 469 $ 458
Lease income - operating leases 2,383 2,431 2,596
Total lease income $ 2,877 $ 2,900 $ 3,054