Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 51	$ 51	$ 49	$ 48
Provision for doubtful accounts, net of recoveries	1	1	8	8
Charge-off of accounts	(1)	(4)	(6)	(9)
Financing Receivable, Allowance for Credit Losses, Other	1	0	1	1
Allowance for doubtful accounts at end of period	52	48	52	48
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	21	21	19	22
Provision for doubtful accounts, net of recoveries	(1)	2	5	5
Charge-off of accounts	(1)	(3)	(5)	(7)
Financing Receivable, Allowance for Credit Losses, Other	1	(2)	1	(2)
Allowance for doubtful accounts at end of period	20	18	20	18
Impaired Financing Receivable, Average Recorded Investment			19	18
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	2	4	2	4
Provision for doubtful accounts, net of recoveries	1	(1)	1	(1)
Charge-off of accounts	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Other	0	0	0	0
Allowance for doubtful accounts at end of period	3	3	3	3
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	28	26	28	22
Provision for doubtful accounts, net of recoveries	1	0	2	4
Charge-off of accounts	0	(1)	(1)	(2)
Financing Receivable, Allowance for Credit Losses, Other	0	2	0	3
Allowance for doubtful accounts at end of period	$ 29	$ 27	$ 29	$ 27