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Accounting for Leases as a Lessor - Lessor Activity Included in Income Statement (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Leases [Abstract]        
Interest income from sales-type leases and direct financing leases $ 188 $ 162 $ 374 $ 318
Lease income from operating leases 539 594 1,086 1,193
Total lease income $ 727 $ 756 $ 1,460 $ 1,511