Financing Receivables and Operating Leases (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Oct. 31, 2012
Gross financing receivables
Net Investment	$ 7,591	$ 7,693
Allowance for doubtful accounts
Balance at beginning of period	149
Additions to allowance	9
Deductions, net of recoveries	(4)
Balance, end of period	154
Allowance for financing receivables individually evaluated for loss	52	45
Allowance for financing receivables collectively evaluated for loss	102	104
Gross financing receivables individually evaluated for loss	496	338
Gross financing receivables collectively evaluated for loss	7,095	7,355
Period past due, after which account is put on non-accrual status	90 days
Period past due, after which a write-off or specific reserve is created	180 days
Total financing receivables on non-accrual status	253	225
Total financing receivables greater than 90 days past due and still accruing interest	243	113
Low
Gross financing receivables
Net Investment	4,346	4,461
Moderate
Gross financing receivables
Net Investment	3,148	3,151
High
Gross financing receivables
Net Investment	$ 97	$ 81