Allowance for Doubtful Accounts Impaired Finance Receivables (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Financing Receivable, Impaired [Line Items]
Specific loss reserves on impaired finance receivables	$ 10	$ 23
Finance receivables on non-accrual status	14	51
Average balance of impaired finance receivables	32	87
Impaired financing receivable without specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	2	1
Impaired finance receivables with specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	15	50
Retail Portfolio [Member]
Financing Receivable, Impaired [Line Items]
Specific loss reserves on impaired finance receivables	10	23
Finance receivables on non-accrual status	14	50
Average balance of impaired finance receivables	32	86
Retail Portfolio [Member] | Impaired financing receivable without specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	2	1
Retail Portfolio [Member] | Impaired finance receivables with specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	15	49
Wholesale Portfolio [Member]
Financing Receivable, Impaired [Line Items]
Specific loss reserves on impaired finance receivables	0	0
Finance receivables on non-accrual status	0	1
Average balance of impaired finance receivables	0	1
Wholesale Portfolio [Member] | Impaired financing receivable without specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	0	0
Wholesale Portfolio [Member] | Impaired finance receivables with specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	$ 0	$ 1