| **Debt**                       | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              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| **Debt Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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| Debt                           | Debt(in millions)April 30, 2014 October 31, 2013Manufacturing operations   Senior Secured Term Loan Credit Facility, as Amended, due 2017, net of unamortized discount of $4 for both periods$694 $6938.25% Senior Notes, due 2021, net of unamortized discount of $21 and $22, respectively1,179 1,1783.00% Senior Subordinated Convertible Notes, due 2014, net of unamortized discount of $4 and $26, respectively163 5444.50% Senior Subordinated Convertible Notes, due 2018, net of unamortized discount of $21 and $23, respectively179 1774.75% Senior Subordinated Convertible Notes, due 2019, net of unamortized discount of $43368 —Debt of majority-owned dealerships48 48Financing arrangements and capital lease obligations59 77Loan Agreement related to 6.5% Tax Exempt Bonds, due 2040225 225Promissory Note15 20Financed lease obligations205 218Other35 39Total Manufacturing operations debt3,170 3,219Less: Current portion267 658Net long-term Manufacturing operations debt$2,903 $2,561(in millions)April 30, 2014 October 31, 2013Financial Services operations   Asset-backed debt issued by consolidated SPEs, at fixed and variable rates, due serially through 2019$844 $778Bank revolvers, at fixed and variable rates, due dates from 2014 through 20191,005 1,018Commercial paper, at variable rates, program matures in 201530 21Borrowings secured by operating and finance leases, at various rates, due serially through 201851 49Total Financial Services operations debt1,930 1,866Less: Current portion689 505Net long-term Financial Services operations debt$1,241 $1,361Manufacturing Operations4.75% Senior Subordinated Convertible NotesDuring the second quarter of 2014, we completed the private sale of $411 million of 4.75% senior subordinated convertible notes due April 2019 ("2019 Convertible Notes"), including a portion of the underwriter's over-allotment option. The Company received proceeds of $402 million, net of $9 million of issuance costs. Interest is payable on April 15 and October 15 of each year until the maturity date. The 2019 Convertible Notes are senior subordinated unsecured obligations of the Company. In accounting for the issuance, the 2019 Convertible Notes were separated into a debt component and an equity component, resulting in the debt component being recorded at estimated fair value without consideration given to the conversion feature. The excess of the principal amount of the liability component over the carrying amount is treated as debt discount and will be amortized to Interest expense using the effective interest method over the term of the 2019 Convertible Notes. We estimated the fair value of the liability component at $367 million. The equity component of $44 million, is recorded inAdditional paid in capital and will not be remeasured as long as it continues to meet the conditions for equity classification. Issuance costs are also allocated between the debt and equity components resulting in $8 million of debt issue costs being recorded in Other noncurrent assets and $1 million recorded as a reduction in Additional paid in capital. The liability component of the debt issuance costs will be amortized to Interest expense over the term of the 2019 Convertible Notes.The Company has the option to redeem the 2019 Convertible Notes for cash, in whole or in part, on any business day on or after April 20, 2017 if the last reported sale price of the Company's common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), during any 30 consecutive trading day period ending within 10 trading days immediately prior to the date of the redemption notice ("Optional Redemption"). The redemption price is equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.Holders may convert the 2019 Convertible Notes into common stock of the Company at any time on or after October 15, 2018. Holders may also convert the 2019 Convertible Notes at their option prior to October 15, 2018, under the following circumstances: (i) during any fiscal quarter (and only during that fiscal quarter) commencing after April 30, 2014, if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the preceding fiscal quarter is greater than or equal to 130% of the applicable conversion price on each such trading day; (ii) during the 5 business day period after any 5 consecutive trading day period (the "Measurement Period") in which the trading price per $1,000 principal amount of notes for each trading day of that Measurement Period was less than 98% of the product of the last reported sale price of the common stock and the applicable conversion rate on each such trading day; (iii) if the Company exercises its Optional Redemption, as described above, after October 15, 2018, holders of the 2019 Convertible Notes will have the right to convert their 2019 Convertible Notes at any time prior to the close of business on the business day preceding the redemption date, or; (iv) upon the occurrence of specified corporate events, as more fully described in the 2019 Convertible Notes indenture. The conversion rate will initially be 18.4946 shares of common stock per $1,000 principal amount of 2019 Convertible Notes (equivalent to an initial conversion price of approximately $54.07 per share of common stock). The conversion rate may be adjusted for anti-dilution provisions and the conversion price may be decreased by the Board of Directors to the extent permitted by law and listing requirements. The 2019 Convertible Notes can be settled in common stock, cash, or a combination of common stock and cash. Upon conversion, the Company will satisfy its conversion obligations by delivering, at its election, shares of common stock (plus cash in lieu of fractional shares), cash ("Cash Settlement"), or any combination of cash and shares of common stock ("Combination Settlement"). If the Company elects a Cash Settlement or a Combination Settlement, the amounts due will be based on a daily conversion value calculated on a proportionate basis for each trading day in a 20 trading-day observation period. If a holder converts its 2019 Convertible Notes on or after October 15, 2018, and the Company elects physical settlement, the holder will not receive the shares of common stock into which the 2019 Convertible Notes are convertible until after the expiration of the observation period, even though the number of shares the holder will receive upon settlement will not change. It is our policy to settle the principal and accrued interest on the 2019 Convertible Notes with cash. Subject to certain exceptions, holders may require the Company to repurchase, for cash, all or part of the 2019 Convertible Notes at a price equal to 100% of the principal amount of the 2019 Convertible Notes being repurchased plus any accrued and unpaid interest. 3.00% Senior Subordinated Convertible NotesIn October 2009, we completed the sale of $570 million aggregate principal amount of 3.00% senior subordinated convertible notes ("2014 Convertible Notes"), including over-allotment options. The 2014 Convertible Notes are senior subordinated unsecured obligations of the Company. In connection with the sale of the 2014 Convertible Notes, the Company purchased call options for $125 million. The call options cover 11,337,870 shares of common stock, subject to adjustments, at an exercise price of $50.27. The call options are intended to minimize share dilution associated with the 2014 Convertible Notes. In addition, in connection with the sale of the 2014 Convertible Notes, the Company also entered into separate warrant transactions whereby, the Company sold warrants for $87 million to sell in the aggregate 11,337,870 shares of common stock, subject to adjustments, at an exercise price of $60.14 per share of common stock.During the second quarter of 2014, the Company used proceeds from the issuance of the 2019 Convertible Notes, as well as cash on-hand, to repurchase $404 million of notional amount of the 2014 Convertible Notes. The Company recorded a charge of $11 million related to the repurchase which was recognized in Other expense (income), net. In conjunction with the repurchases of the 2014 Convertible Notes, call options representing 8,026,456 shares expired or were unwound by the Company and warrants representing 6,523,319 shares were unwound by the Company.Financial Services OperationsIn March 2014, the maturity date of the $500 million variable funding notes was extended from September 2014 to March 2015.In November 2013, Navistar Financial, S.A. de C.V., SOFOM, E.N.R, our Mexican financial services affiliate ("NFM"), expanded its facility of five-year notes secured by retail finance receivables by selling an additional P$800 million (the  equivalent of approximately US$61 million at April 30, 2014). In December 2013, International Truck Leasing Corporation, a special purpose, wholly-owned subsidiary of NFC, issued borrowings secured by operating and finance leases of $21 million. |

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| - Definition
The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
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