Accounting for Leases as a Lessor - Credit Risk Profile of Financing Receivables (Details) - USD ($) $ in Millions	Apr. 30, 2022	Oct. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Total	$ 8,666	$ 9,198
Low
Financing Receivable, Allowance for Credit Loss [Line Items]
2022/2021	901	1,978
2021/2020	1,788	1,441
2020/2019	1,092	829
2019/2018	567	364
2018/2017 and prior	270	169
Total	4,618	4,781
Moderate
Financing Receivable, Allowance for Credit Loss [Line Items]
2022/2021	611	1,542
2021/2020	1,368	1,061
2020/2019	807	771
2019/2018	540	407
2018/2017 and prior	387	234
Total	3,713	4,015
High
Financing Receivable, Allowance for Credit Loss [Line Items]
2022/2021	19	49
2021/2020	45	87
2020/2019	72	85
2019/2018	75	78
2018/2017 and prior	124	103
Total	$ 335	$ 402