Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015		Apr. 30, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 58	$ 60	$ 65		$ 60
Provision for doubtful accounts, net of recoveries	3	4	5	[1]	10	[1]
Charge-off of accounts	0	(5)	(4)	[2]	(7)	[2]
Allowance for doubtful accounts at end of period	58	62	58		62
Loss on Contract Termination for Default	1	1	1		1
Financing Receivable, Allowance for Credit Losses, Other	(3)	3	(8)		(1)
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	23	22	24		21
Provision for doubtful accounts, net of recoveries	3	3	5	[1]	7	[1]
Charge-off of accounts	0	(3)	(1)	[2]	(5)	[2]
Allowance for doubtful accounts at end of period	25	22	25		22
Financing Receivable, Allowance for Credit Losses, Other	(1)	0	(3)		(1)
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	32	36	38		37
Provision for doubtful accounts, net of recoveries	0	1	0	[1]	3	[1]
Charge-off of accounts	0	(2)	(3)	[2]	(2)	[2]
Allowance for doubtful accounts at end of period	30	38	30		38
Financing Receivable, Allowance for Credit Losses, Other	$ (2)	$ 3	$ (5)		$ 0

[1] (A)

[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 six months ended April 30, 2015, as well as for the three and six months ended April 30, 2014