Financing Receivables and Operating Leases (Details 2) (USD $) In Millions	6 Months Ended
	Apr. 30, 2011	Oct. 31, 2010
Gross financing receivables
Net Investment	$ 7,178	$ 6,710
Allowance for doubtful accounts
Balance, beginning of period	140
Additions to allowance	22
Deductions, net of recoveries	(32)
Balance, end of period	130
Allowance for financing receivables individually evaluated for loss	43	53
Allowance for financing receivables collectively evaluated for loss	87	87
Gross financing receivables individually evaluated for loss	73	75
Gross financing receivables collectively evaluated for loss	7,105	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	164
Total financing receivables 90 days or greater past due and still accruing interest	113
Low
Gross financing receivables
Net Investment	4,166	3,793
Moderate
Gross financing receivables
Net Investment	2,927	2,829
High
Gross financing receivables
Net Investment	$ 85	$ 88