Allowance for Doubtful Accounts - Retail, Wholesale, Trade & Other (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014 class segments	Apr. 30, 2013	Apr. 30, 2014 class segments	Apr. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Portfolio Segments for Finance Receivables	2		2
Classes of Receivables in Each Portfolio	1		1
Allowance for doubtful accounts at beginning of period	$ 60	$ 49	$ 60	$ 51
Provision for doubtful accounts, net of recoveries	4	11	10	11
Charge-off of accounts(A)	(5)	(3)	(7)	(6)
Financing Receivable, Allowance for Credit Losses, Other	3	1	(1)	2
Allowance for doubtful accounts at end of period	62	58	62	58
Loss on Contract Termination for Default	1	1	1	1
Retail Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for doubtful accounts at beginning of period	22	23	21	27
Provision for doubtful accounts, net of recoveries	3	1	7	(1)
Charge-off of accounts(A)	(3)	(3)	(5)	(6)
Financing Receivable, Allowance for Credit Losses, Other	0	1	(1)	2
Allowance for doubtful accounts at end of period	22	22	22	22
Impaired Financing Receivable, Average Recorded Investment			16	13
Wholesale Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for doubtful accounts at beginning of period	2	2	2	0
Provision for doubtful accounts, net of recoveries	0	0	0	2
Charge-off of accounts(A)	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Other	0	0	0	0
Allowance for doubtful accounts at end of period	2	2	2	2
Trade and Other Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for doubtful accounts at beginning of period	36	24	37	24
Provision for doubtful accounts, net of recoveries	1	10	3	10
Charge-off of accounts(A)	(2)	0	(2)	0
Financing Receivable, Allowance for Credit Losses, Other	3	0	0	0
Allowance for doubtful accounts at end of period	$ 38	$ 34	$ 38	$ 34