Financing Receivables and Operating Leases (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Apr. 30, 2014	Oct. 31, 2013
Gross financing receivables
Net Investment	$ 6,890	$ 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	17
Deductions, net of recoveries	(11)
Balance at end of period	137
Gross financing receivables collectively evaluated for loss	6,601	6,773
Gross financing receivables individually evaluated for loss	289	380
Allowance for financing receivables collectively evaluated for loss	94	95
Allowance for financing receivables individually evaluated for loss	43	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	296	217
Past due 31-60 days	28	50
Past due 61-90 days	25	15
Past due >90 days	54	46
Unbilled sales-type and direct-financing lease receivables	6,487	6,825
Gross financing receivables on non-accrual status	160	199
Gross financing receivables 90 days past due and still accruing interest	129	181
Operating lease assets
Equipment leased to customers	3,950	3,822
Accumulated depreciation	(1,476)	(1,452)
Operating lease assets, net	2,474	2,370
Low
Gross financing receivables
Net Investment	3,740	3,948
Moderate
Gross financing receivables
Net Investment	3,024	3,084
High
Gross financing receivables
Net Investment	$ 126	$ 121