Financing Receivables and Operating Leases (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2011 D	Oct. 31, 2010
Gross financing receivables
Net Investment	$ 7,307	$ 6,710
Allowance for doubtful accounts
Balance at beginning of period	140
Additions to allowance	58
Deductions, net of recoveries	(68)
Balance, end of period	130
Allowance for financing receivables individually evaluated for loss	35	53
Allowance for financing receivables collectively evaluated for loss	95	87
Gross financing receivables individually evaluated for loss	157	271
Gross financing receivables collectively evaluated for loss	7,150	6,439
Period past due, after which account is put on non-accrual status (in days)	90
Period past due, after which a write-off or specific reserve is created (in days)	180
Total financing receivables on non-accrual status	157	271
Total financing receivables greater than 90 days past due and still accruing interest	71	83
Low
Gross financing receivables
Net Investment	4,261	3,793
Moderate
Gross financing receivables
Net Investment	2,989	2,829
High
Gross financing receivables
Net Investment	$ 57	$ 88