Finance Receivables - Schedule of Finance Receivables (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables	$ 1,652	$ 1,647
Less: Allowance for credit losses	48	44	$ 43	$ 46	$ 44
Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables	1,652	1,647
Less: Allowance for credit losses	34	25
Total finance receivables, net	1,618	1,622
Less: Current portion, net	1,360	1,371
Noncurrent portion, net	258	251
Retail portfolio | Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables	643	622
Wholesale portfolio | Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total finance receivables	$ 1,009	$ 1,025