Financing Receivables and Operating Leases - Summary of the Aging and Non-accrual Status of Gross Financing Receivables (Details) - USD ($) $ in Millions	Jul. 31, 2018	Oct. 31, 2017
Billed:
Current 1-30 days	$ 274	$ 257
Past due 31-60 days	59	52
Past due 61-90 days	15	15
Past due 90 days	84	58
Unbilled sales-type and direct-financing lease receivables	7,683	7,462
Financing receivables, gross	8,115	7,844
Gross financing receivables on non-accrual status	246	188
Gross financing receivables 90 days past due and still accruing interest	$ 161	$ 133

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

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

+ Details

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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