Financing Receivables and Operating Leases (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
Apr. 30, 2015	Oct. 31, 2014
Gross financing receivables
Financing receivables, gross	$ 6,405us-gaap_NotesReceivableNet	$ 6,670us-gaap_NotesReceivableNet
Period past due, after which a write-off or specific reserve is created	180 days
Allowance for doubtful accounts
Balance at beginning of period	111
Provision for doubtful accounts	7
Deductions	(14)
Balance at end of period	104
Gross financing receivables collectively evaluated for loss	6,180	6,378
Gross financing receivables individually evaluated for loss	225	292
Allowance for financing receivables collectively evaluated for loss	80	92
Allowance for financing receivables individually evaluated for loss	24	19
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	339	243
Past due 31-60 days	33	46
Past due 61-90 days	25	12
Past due >90 days	51	49
Unbilled sales-type and direct-financing lease receivables	5,957	6,320
Gross financing receivables on non-accrual status	113	130
Gross financing receivables 90 days past due and still accruing interest	112	162
Operating lease assets
Equipment leased to customers	3,996	3,977
Accumulated depreciation	(1,390)	(1,382)
Operating lease assets, net	2,606	2,595
Low
Gross financing receivables
Financing receivables, gross	3,318	3,536
Moderate
Gross financing receivables
Financing receivables, gross	2,998	3,022
High
Gross financing receivables
Financing receivables, gross	$ 89	$ 112

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Financing receivables that are less than 61 days past due but more than 30 days past due.

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Financing receivables that are less than 91 days past due but more than 60 days past due.

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Financing receivables that are equal to or greater than 91 days past due.

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Sales-type and direct-financing lease receivables that are unbilled at the end of the of the reporting period.

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No definition available.

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Represents the number of days past due after which the entity ceases to accrue interest on the receivable.

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Represents the number of days an account is past due after which the account is written off or a specific reserve is created.

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A valuation allowance for financing receivables that are expected to be uncollectible.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Recorded investment in financing receivables that are 90 days or more past due and still accruing.

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Financing receivables that are current.

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date.

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Amount before accumulated depreciation of physical assets used in the normal conduct of business to produce goods and services subject to or available for lease.

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The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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