Accounting for Leases as a Lessor - Credit Risk Profile of Financing Receivables (Details) - USD ($) $ in Millions	Jul. 31, 2025	Oct. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, gross	$ 9,628	$ 9,647
Low
Financing Receivable, Allowance for Credit Loss [Line Items]
2025/2024	1,451	2,630
2024/2023	2,400	1,804
2023/2022	1,371	1,128
2022/2021	733	440
2021/2020 and prior	275	158
Financing receivables, gross	6,230	6,160
Moderate
Financing Receivable, Allowance for Credit Loss [Line Items]
2025/2024	746	1,120
2024/2023	1,020	948
2023/2022	738	665
2022/2021	426	317
2021/2020 and prior	261	193
Financing receivables, gross	3,191	3,243
High
Financing Receivable, Allowance for Credit Loss [Line Items]
2025/2024	6	19
2024/2023	36	54
2023/2022	51	46
2022/2021	30	52
2021/2020 and prior	84	73
Financing receivables, gross	$ 207	$ 244

Financing Receivable, Originated, More than Four Years before Current Fiscal Year

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Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

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