Accounting for Leases as a Lessor - Credit Risk Profile of Financing Receivables (Details) - USD ($) $ in Millions	Oct. 31, 2021	Oct. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivables, gross	$ 9,198	$ 9,058
Low
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	1,978
2020	1,441
2019	829
2018	364
2017 and prior	169
Financing receivables, gross	4,781	4,590
Moderate
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	1,542
2020	1,061
2019	771
2018	407
2017 and prior	234
Financing receivables, gross	4,015	4,091
High
Financing Receivable, Allowance for Credit Loss [Line Items]
2021	49
2020	87
2019	85
2018	78
2017 and prior	103
Financing receivables, gross	$ 402	$ 377

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

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Amount of financing receivable originated in current fiscal year.

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Amount of financing receivable originated three years prior to current fiscal year.

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Amount, before allowance for credit loss, of financing receivable.

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