Financing Receivables and Operating Leases (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jul. 31, 2014	Oct. 31, 2013
Gross financing receivables
Financing receivables, gross	$ 6,780	$ 7,153
Period past due, after which a write-off or specific reserve is created	180 days
Allowance for doubtful accounts
Balance at beginning of period	131
Provision for doubtful accounts	24
Deductions, net of recoveries	(29)
Balance at end of period	126
Gross financing receivables collectively evaluated for loss	6,464	6,773
Gross financing receivables individually evaluated for loss	316	380
Allowance for financing receivables collectively evaluated for loss	93	95
Allowance for financing receivables individually evaluated for loss	33	36
Period past due, after which account is put on non-accrual status	90 days
Aging and non-accrual status of gross financing receivables
Current 1-30 days	245	217
Past due 31-60 days	56	50
Past due 61-90 days	15	15
Past due >90 days	60	46
Unbilled sales-type and direct-financing lease receivables	6,404	6,825
Gross financing receivables on non-accrual status	180	199
Gross financing receivables 90 days past due and still accruing interest	136	181
Operating lease assets
Equipment leased to customers	3,960	3,822
Accumulated depreciation	(1,436)	(1,452)
Operating lease assets, net	2,524	2,370
Low
Gross financing receivables
Financing receivables, gross	3,679	3,948
Moderate
Gross financing receivables
Financing receivables, gross	2,961	3,084
High
Gross financing receivables
Financing receivables, gross	$ 140	$ 121