Financing Receivables and Operating Leases (Details 2) (USD $) In Millions	9 Months Ended
	Jul. 31, 2011	Oct. 31, 2010
Gross financing receivables
Gross financing receivables	$ 7,250	$ 6,710
Allowance for doubtful accounts
Balance, beginning of period	140
Additions to allowance	34
Deductions, net of recoveries	(38)
Balance, end of period	136
Allowance for financing receivables individually evaluated for loss	47	53
Allowance for financing receivables collectively evaluated for loss	89	87
Gross financing receivables individually evaluated for loss	72	75
Gross financing receivables collectively evaluated for loss	7,178	6,635
Period past due, after which account is put on non-accrual status (in days)	90 days
Period past due, after which a write-off or specific reserve is created (in days)	180 days
Total financing receivables on non-accrual status	195
Total financing receivables 90 days or greater past due and still accruing interest	94
Low
Gross financing receivables
Gross financing receivables	4,239	3,793
Moderate
Gross financing receivables
Gross financing receivables	2,947	2,829
High
Gross financing receivables
Gross financing receivables	$ 64	$ 88