Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 43	$ 54	$ 44	$ 50
Provision for Loan, Lease, and Other Losses	4	2	13	8
Financing Receivable, Allowance for Credit Loss, Writeoff	(4)	(2)	(7)	(5)
Financing Receivable, Allowance for Credit Losses, Other	1	1	(6)	2
Allowance for doubtful accounts at end of period	45	56	45	56
Accounts Receivable, Allowance for Credit Loss, Recovery		1
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss, Recovery	1
Retail Portfolio [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts at beginning of period	21	22	20	19
Provision for Loan, Lease, and Other Losses	4	1	11	5
Financing Receivable, Allowance for Credit Loss, Writeoff	(4)	(2)	(7)	(4)
Financing Receivable, Allowance for Credit Losses, Other	1	(1)	(2)	0
Allowance for doubtful accounts at end of period	23	21	23	21
Impaired Financing Receivable, Average Recorded Investment			29	21
Accounts Receivable, Allowance for Credit Loss, Recovery		1
Wholesale Portfolio [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts at beginning of period	2	3	3	3
Provision for Loan, Lease, and Other Losses	0	0	(1)	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Other	0	0	0	0
Allowance for doubtful accounts at end of period	2	3	2	3
Accounts Receivable, Allowance for Credit Loss, Recovery		0
Trade and Other Receivables [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts at beginning of period	20	29	21	28
Provision for Loan, Lease, and Other Losses	0	1	3	3
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	(1)
Financing Receivable, Allowance for Credit Losses, Other	0	2	(4)	2
Allowance for doubtful accounts at end of period	20	32	$ 20	$ 32
Accounts Receivable, Allowance for Credit Loss, Recovery		$ 0
Trade and Other Receivables [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss, Recovery	0
Wholesale Portfolio [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss, Recovery	0
Retail Portfolio [Member]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss, Recovery	$ 1