Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 49	$ 46	$ 49	$ 48
Provision for doubtful accounts, net of recoveries	1	2	7	7
Charge-off of accounts	(1)	(1)	(5)	(5)
Financing Receivable, Allowance for Credit Losses, Other	2	4	0	1
Allowance for doubtful accounts at end of period	51	51	51	51
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	19	19	19	22
Provision for doubtful accounts, net of recoveries	1	1	6	3
Charge-off of accounts	(1)	(1)	(4)	(4)
Financing Receivable, Allowance for Credit Losses, Other	2	2	0	0
Allowance for doubtful accounts at end of period	21	21	21	21
Impaired Financing Receivable, Average Recorded Investment			17	21
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	0	0	0	0
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	2	4	2	4
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	28	23	28	22
Provision for doubtful accounts, net of recoveries	0	1	1	4
Charge-off of accounts	0	0	(1)	(1)
Financing Receivable, Allowance for Credit Losses, Other	0	2	0	1
Allowance for doubtful accounts at end of period	$ 28	$ 26	$ 28	$ 26