Finance Receivables - Schedule of Finance Revenues (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Finance Revenues [Line Items]
Retail notes and finance leases revenue	$ 12nav_RetailNotesAndFinanceLeasesRevenue	$ 16nav_RetailNotesAndFinanceLeasesRevenue	$ 25nav_RetailNotesAndFinanceLeasesRevenue	$ 33nav_RetailNotesAndFinanceLeasesRevenue
Gross finance revenues	60	57	120	112
Less: Intercompany revenues	(25)us-gaap_RevenueFromRelatedParties	(19)us-gaap_RevenueFromRelatedParties	(49)us-gaap_RevenueFromRelatedParties	(35)us-gaap_RevenueFromRelatedParties
Finance revenues	35us-gaap_FinancialServicesRevenue	38us-gaap_FinancialServicesRevenue	71us-gaap_FinancialServicesRevenue	77us-gaap_FinancialServicesRevenue
Financing Receivable [Member]
Finance Revenues [Line Items]
Operating lease revenue	15	15	30	29
Wholesale Portfolio [Member] \| Notes Receivable [Member]
Finance Revenues [Line Items]
Interest Income, Operating	24	19	48	37
Retail And Wholesale Portfolios [Member]
Finance Revenues [Line Items]
Interest Income, Operating	$ 9	$ 7	$ 17	$ 13

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Finance Revenues From On Balance Sheet Receivables

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- Definition

Retail Notes And Finance Leases Revenue

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No definition available.

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- Definition

The aggregate financial services revenue and operating interest income earned during the reporting period.

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- Definition

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

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- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Related Parties

-URI http://asc.fasb.org/extlink&oid=16382449

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.6-07.1(c))

-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 07

-Paragraph b

-Subparagraph 1

-Article 6

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