Financing Receivables and Operating Leases (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jul. 31, 2013	Oct. 31, 2012
Gross financing receivables
Net Investment	$ 7,086	$ 7,693
Period past due, after which a write-off or specific reserve is created	180 days
Allowance for doubtful accounts
Balance at beginning of period	149
Change in estimates	22
Deductions, net of recoveries	(39)
Balance, end of period	132
Allowance for financing receivables collectively evaluated for loss	92	104
Allowance for financing receivables individually evaluated for loss	40	45
Gross financing receivables collectively evaluated for loss	6,662	7,355
Gross financing receivables individually evaluated for loss	424	338
Gross financing receivables on non-accrual status	251	225
Gross financing receivables 90 days past due and still accruing interest	173	113
Total	424	338
Period past due, after which account is put on non-accrual status	90 days
Low
Gross financing receivables
Net Investment	3,942	4,461
Moderate
Gross financing receivables
Net Investment	3,026	3,151
High
Gross financing receivables
Net Investment	$ 118	$ 81