Allowance for Credit Losses - Credit Quality Indicators (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 1,652	$ 1,647
Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	88
2020	139
2019	100
2018	67
2017	25
Prior to 2017	8
Total	427
Total performing receivables | Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	86
2020	135
2019	95
2018	58
2017	21
Prior to 2017	4
Total	399
Total performing receivables | U.S Financing Receivables | Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	10
2020	16
2019	8
2018	5
2017	5
Prior to 2017	0
Total	44
Total performing receivables | Mexican Financing Receivables | Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	76
2020	119
2019	87
2018	53
2017	16
Prior to 2017	4
Total	355
Total non-performing receivables | Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2
2020	4
2019	5
2018	9
2017	4
Prior to 2017	4
Total	28
Total non-performing receivables | U.S Financing Receivables | Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	0
2019	0
2018	0
2017	0
Prior to 2017	0
Total	0
Total non-performing receivables | Mexican Financing Receivables | Retail financing
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2
2020	4
2019	5
2018	9
2017	4
Prior to 2017	4
Total	$ 28