Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 46	$ 58	$ 48	$ 65
Provision for doubtful accounts, net of recoveries	2	3	7	5
Charge-off of accounts	(1)	0	(5)	(4)
Allowance for doubtful accounts at end of period	51	58	51	58
Loss on Contract Termination for Default	0	1	1	1
Financing Receivable, Allowance for Credit Losses, Other	4	(3)	1	(8)
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	19	23	22	24
Provision for doubtful accounts, net of recoveries	1	3	3	5
Charge-off of accounts	(1)	0	(4)	(1)
Allowance for doubtful accounts at end of period	21	25	21	25
Financing Receivable, Allowance for Credit Losses, Other	2	(1)	0	(3)
Impaired Financing Receivable, Average Recorded Investment			21	25
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	0	0	0	0
Charge-off of accounts	0	0	0	0
Allowance for doubtful accounts at end of period	4	3	4	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	23	32	22	38
Provision for doubtful accounts, net of recoveries	1	0	4	0
Charge-off of accounts	0	0	(1)	(3)
Allowance for doubtful accounts at end of period	26	30	26	30
Financing Receivable, Allowance for Credit Losses, Other	$ 2	$ (2)	$ 1	$ (5)