Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015		Jul. 31, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 58	$ 62	$ 65		$ 60
Provision for doubtful accounts, net of recoveries	2	3	7	[1]	13	[1]
Charge-off of accounts	(1)	(5)	(5)	[2]	(12)	[2]
Allowance for doubtful accounts at end of period	54	60	54		60
Loss on Contract Termination for Default	1	1	1		1
Financing Receivable, Allowance for Credit Losses, Other	(5)	0	(13)		(1)
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	25	22	24		21
Provision for doubtful accounts, net of recoveries	2	3	7	[1]	10	[1]
Charge-off of accounts	0	(2)	(1)	[2]	(7)	[2]
Allowance for doubtful accounts at end of period	25	24	25		24
Financing Receivable, Allowance for Credit Losses, Other	(2)	1	(5)		0
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	3	2	3		2
Provision for doubtful accounts, net of recoveries	0	0	0	[1]	0	[1]
Charge-off of accounts	0	0	0	[2]	0	[2]
Allowance for doubtful accounts at end of period	3	2	3		2
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	30	38	38		37
Provision for doubtful accounts, net of recoveries	0	0	0	[1]	3	[1]
Charge-off of accounts	(1)	(3)	(4)	[2]	(5)	[2]
Allowance for doubtful accounts at end of period	26	34	26		34
Financing Receivable, Allowance for Credit Losses, Other	$ (3)	$ (1)	$ (8)		$ (1)

[1] (B)

[2] We repossess sold and leased vehicles on defaulted finance receivables and leases, and place them into Inventories. Losses recognized at the time of repossession and charged against the allowance for doubtful accounts were both less than $1 million, for the three and nine months ended July 31, 2015, as well as for the three and nine months ended July 31, 2014