Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 51	$ 58	$ 48	$ 65
Provision for doubtful accounts, net of recoveries	1	2	8	7
Charge-off of accounts	(4)	(1)	(9)	(5)
Allowance for doubtful accounts at end of period	48	54	48	54
Financing Receivable, Allowance for Credit Losses, Other	0	(5)	1	(13)
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	21	25	22	24
Provision for doubtful accounts, net of recoveries	2	2	5	7
Charge-off of accounts	(3)	0	(7)	(1)
Allowance for doubtful accounts at end of period	18	25	18	25
Financing Receivable, Allowance for Credit Losses, Other	(2)	(2)	2	(5)
Impaired Financing Receivable, Average Recorded Investment			18	21
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	4	3	4	3
Provision for doubtful accounts, net of recoveries	(1)	0	(1)	0
Charge-off of accounts	0	0	0	0
Allowance for doubtful accounts at end of period	3	3	3	3
Financing Receivable, Allowance for Credit Losses, Other	0	0	0	0
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	26	30	22	38
Provision for doubtful accounts, net of recoveries	0	0	4	0
Charge-off of accounts	(1)	(1)	(2)	(4)
Allowance for doubtful accounts at end of period	27	26	27	26
Financing Receivable, Allowance for Credit Losses, Other	$ 2	$ (3)	$ 3	$ (8)