Allowance for Doubtful Accounts - Retail, Wholesale, Trade & Other (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014 class segments	Jul. 31, 2013	Jul. 31, 2014 class segments	Jul. 31, 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	$ 62	$ 58	$ 60	$ 51
Provision for doubtful accounts, net of recoveries	3	5	13	16
Charge-off of accounts(A)	(5)	(1)	(12)	(7)
Financing Receivable, Allowance for Credit Losses, Other	0	(3)	(1)	(1)
Allowance for doubtful accounts at end of period	60	59	60	59
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	22	21	27
Provision for doubtful accounts, net of recoveries	3	2	10	1
Charge-off of accounts(A)	(2)	(1)	(7)	(7)
Financing Receivable, Allowance for Credit Losses, Other	1	(1)	0	1
Allowance for doubtful accounts at end of period	24	22	24	22
Impaired Financing Receivable, Average Recorded Investment			15	12
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	38	34	37	24
Provision for doubtful accounts, net of recoveries	0	3	3	13
Charge-off of accounts(A)	(3)	0	(5)	0
Financing Receivable, Allowance for Credit Losses, Other	(1)	(2)	(1)	(2)
Allowance for doubtful accounts at end of period	$ 34	$ 35	$ 34	$ 35