Allowance for Doubtful Accounts Impaired Finance Receivables (Details) (USD $) In Millions	9 Months Ended
	Jul. 31, 2011
Financing Receivable, Impaired [Line Items]
Specific loss reserves on impaired finance receivables	$ 13
Finance receivables on non-accrual status	17
Average balance of impaired finance receivables	37
Retail Portfolio [Member]
Financing Receivable, Impaired [Line Items]
Specific loss reserves on impaired finance receivables	13
Finance receivables on non-accrual status	17
Average balance of impaired finance receivables	37
Retail Portfolio [Member] | Impaired finance receivables with specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	22
Retail Portfolio [Member] | Impaired financing receivable without specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	0
Wholesale Portfolio [Member]
Financing Receivable, Impaired [Line Items]
Specific loss reserves on impaired finance receivables	0
Finance receivables on non-accrual status	0
Average balance of impaired finance receivables	0
Wholesale Portfolio [Member] | Impaired finance receivables with specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	0
Wholesale Portfolio [Member] | Impaired financing receivable without specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	0
Impaired finance receivables with specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	22
Impaired financing receivable without specific loss reserves [Member]
Financing Receivable, Impaired [Line Items]
Impaired finance receivables	$ 0