| **Summary of Significant Accounting Policies** | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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| **Accounting Policies [Abstract]**             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   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| Summary of Significant Accounting Policies     | Summary of Significant Accounting PoliciesOrganization and Description of the BusinessNavistar International Corporation ("NIC"), incorporated under the laws of the State of Delaware in 1993, is a holding company whose principal operating subsidiaries are Navistar, Inc. and Navistar Financial Corporation ("NFC"). References herein to the "Company," "we," "our," or "us" refer collectively to NIC and its consolidated subsidiaries, including certain variable interest entities ("VIEs") of which we are the primary beneficiary. Our fiscal year ends October 31. As such, all references to 2013 and 2012 contained within this Quarterly Report on Form 10-Q relate to our fiscal year, unless otherwise indicated. We operate in four principal industry segments: Truck, Engine, and Parts (collectively called "Manufacturing operations"), and Financial Services, which consists of NFC and our foreign finance operations (collectively called "Financial Services operations"). These segments are discussed in Note 13, Segment Reporting.Basis of Presentation and ConsolidationThe accompanying unaudited consolidated financial statements include the assets, liabilities, and results of operations of our manufacturing operations, which include majority-owned dealers ("Dealcors"), and our financial services operations, including VIEs of which we are the primary beneficiary. The effects of transactions among consolidated entities have been eliminated to arrive at the consolidated amounts. Certain reclassifications were made to prior periods' amounts to conform to the 2013 presentation, which includes the presentation of certain former businesses as discontinued operations. For more information, see Note 2, Discontinued Operations and Other Divestitures.We prepared the accompanying unaudited consolidated financial statements in accordance with United States ("U.S.") generally accepted accounting principles ("U.S. GAAP") for interim financial information and the instructions to the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X issued by the U.S. Securities and Exchange Commission ("SEC"). Accordingly, they do not include all of the information and notes required by U.S. GAAP for comprehensive annual financial statements.The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting policies described in our Annual Report on Form 10-K for the year ended October 31, 2012 and Current Report on Form 8-K filed on March 25, 2013, all of which should be read in conjunction with the disclosures therein. In our opinion, these interim consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary to present fairly the financial condition, results of operations, and cash flows for the periods presented. Operating results for interim periods are not necessarily indicative of annual operating results.Out-Of-Period AdjustmentsIncluded in the results of operations for the three and six months ended April 30, 2013 are out-of-period adjustments, which represent corrections of prior-period errors related to the accounting for certain sales transactions. In March 2010, we entered into an operating agreement with GE Capital Corporation and GE Capital Commercial, Inc. (collectively “GE”). Under the terms of the agreement, GE became our preferred source of retail customer financing for equipment offered by us and our dealers in the U.S. We provide GE a loss sharing arrangement for certain credit losses. The determination was made that certain sales that were ultimately financed by GE did not qualify for revenue recognition, as we retained substantial risks of ownership in the leased property. As a result, the transactions should have been accounted for as borrowings, resulting in the proceeds from the transfer being recorded as an obligation and amortized to revenue over the term of the financing. In addition, the financed equipment should have been transferred from inventory to equipment leased to others and depreciated over the term of the financing. Correcting the errors, which were not material to any of the prior periods, resulted in a $9 million and $8 million increase to Net loss in our Consolidated Statements of Operations for the three and six months ended April 30, 2013, respectively. The impact of the correction on our results for the three months ended April 30, 2013 related to prior periods includes: (i) a $124 million net decrease to Sales of manufactured products, net, (ii) a $126 million net decrease to Costs of products sold, including $46 million of additional depreciation expense, and (iii) an $11 million increase to Interest expense. The impact of the correction on our results for the six months ended April 30, 2013 related to prior periods includes: (i) a $113 million net decrease to Sales of manufactured products, net, (ii) a $113 million net decrease to Costs of products sold, including $37 million of additional depreciation expense, and (iii) an $8 million increase to Interest expense. In addition, in our Condensed Consolidated Statements of Cash Flows we recognized Purchases of equipment leased to others of $184 million and Proceeds from financed lease obligations of $201 million related to periods prior to fiscal 2013. The impact of the corrections was not material to any of our Consolidated Balance Sheets.Variable Interest EntitiesWe have an interest in several VIEs, primarily joint ventures, established to manufacture or distribute products and enhance our operational capabilities. We have determined for certain of our VIEs that we are the primary beneficiary because we have the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and have the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. Accordingly, we include in our consolidated financial statements the assets and liabilities and results of operations of those entities, even though we may not own a majority voting interest. The liabilities recognized as a result of consolidating these VIEs do not represent additional claims on our general assets; rather they represent claims against the specific assets of these VIEs. Assets of these entities are not readily available to satisfy claims against our general assets.We are the primary beneficiary of our Blue Diamond Parts ("BDP") and Blue Diamond Truck ("BDT") joint ventures with Ford Motor Company ("Ford"). As a result, our Consolidated Balance Sheets include assets of $266 million and $246 million and liabilities of $165 million and $109 million as of April 30, 2013 and October 31, 2012, respectively, from BDP and BDT, including $34 million and $26 million of cash and cash equivalents, at the respective dates, which are not readily available to satisfy claims against our general assets. The creditors of BDP and BDT do not have recourse to our general credit. In December 2011, Ford notified the Company of its intention to dissolve the BDT joint venture effective December 2014. We do not expect the dissolution of the BDT joint venture to have a material impact on our consolidated financial statements.Our Financial Services segment consolidates several VIEs. As a result, our Consolidated Balance Sheets include assets of $1.0 billion and $1.1 billion and liabilities of $773 million and $914 million as of April 30, 2013 and October 31, 2012, respectively, all of which are involved in securitizations that are treated as borrowings. In addition, our Consolidated Balance Sheets include assets of $317 million and $359 million and related liabilities of $96 million and $157 million as of April 30, 2013 and October 31, 2012, respectively, all of which are involved in transactions that do not qualify for sale accounting treatment, and therefore, are treated as borrowings. Investors that hold securitization debt have a priority claim on the cash flows generated by their respective securitized assets to the extent that the related trusts are entitled to make principal and interest payments. Investors in securitizations of these entities have no recourse to our general credit.We also have an interest in other VIEs, which we do not consolidate because we are not the primary beneficiary. Our financial support and maximum loss exposure relating to these non-consolidated VIEs are not material to our financial condition, results of operations, or cash flows.We use the equity method to account for our investments in entities that we do not control under the voting interest or variable interest models, but where we have the ability to exercise significant influence over operating and financial policies. Equity in loss of non-consolidated affiliates includes our share of the net income (loss) of these entities.Use of EstimatesThe preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses for the periods presented. Significant estimates and assumptions are used for, but are not limited to, pension and other postretirement benefits, allowance for doubtful accounts, income tax contingency accruals and valuation allowances, product warranty accruals, asbestos and other product liability accruals, asset impairment charges, and litigation-related accruals. Actual results could differ from our estimates.Concentration RisksOur financial condition, results of operations, and cash flows are subject to concentration risks related to concentrations of our union employees. As of April 30, 2013, approximately 4,600, or 51%, of our hourly workers and approximately 400, or 5%, of our salaried workers are represented by labor unions and are covered by collective bargaining agreements. Our future operations may be affected by changes in governmental procurement policies, budget considerations, changing national defense requirements, and global, political, regulatory and economic developments in the U.S. and certain foreign countries (primarily Canada, Mexico, and Brazil).Product Warranty LiabilityThe following table presents accrued product warranty and deferred warranty revenue activity:  Six Months Ended April 30,(in millions)2013 2012Balance at beginning of period$1,118 $598Costs accrued and revenues deferred226 236Adjustments to pre-existing warranties(A)(B)204 227Payments and revenues recognized(327) (217)Balance at end of period1,221 844Less: Current portion647 365Noncurrent accrued product warranty and deferred warranty revenue$574 $479_________________________(A)Adjustments to pre-existing warranties reflect changes in our estimate of warranty costs for products sold in prior periods. Such adjustments typically occur when claims experience deviates from historic and expected trends. Our warranty liability is generally affected by component failure rates, repair costs, and the timing of failures. Future events and circumstances related to these factors could materially change our estimates and require adjustments to our liability. In addition, new product launches require a greater use of judgment in developing estimates until historical experience becomes available. Inthe first quarter of 2013, we recorded adjustments for changes in estimates of $40 million, or $0.50 per diluted share. Inthe second quarter of 2013, we recorded adjustments for changes in estimates of $164 million, or $2.04 per diluted share. The impact of income taxes on the 2013 adjustments are not material due to our deferred tax valuation allowances on our U.S. deferred tax assets. In the first quarter of 2012, adjustments for changes in estimates amounted to $123 million, $119 million net of tax or $1.70 per diluted share.  In the second quarter of 2012, we recorded adjustments for changes in estimates of $104 million, $100 million net of tax or $1.46.  The impact of income taxes on the 2012 adjustments reflect the Company's 2012 estimated annual effective tax rate as of April 30, 2012.(B)In the first quarter of 2013, we recognized $13 million of charges for adjustments to pre-existing warranties for a specific warranty issue related to component parts from a supplier. Also during the quarter, we reached agreement for reimbursement from this supplier for this amount and other costs previously accrued. As a result of this agreement, we recognized a recovery of $27 million within Costs of products sold and recorded a receivable within Other current assets. In the second quarter of 2013, we recognized a warranty recovery of $13 million within Loss from discontinued operations, net of tax and recorded a receivable within Other current assets.The amount of deferred revenue related to extended warranty programs was $405 million and $364 million at April 30, 2013 and October 31, 2012, respectively. Revenue recognized under our extended warranty programs was $11 million and $40 million for the three and six months ended April 30, 2013, respectively, and $16 million and $31 million for the three and six months ended April 30, 2012, respectively. In the second quarters of 2013 and 2012, the Truck segment recognized charges of $33 million and $24 million, respectively, related to the extended warranty contracts on our 2010 emission standard MaxxForce Big-Bore engines. The majority of these changes are included in the adjustments to pre-existing warranties.Recently Issued and Adopted Accounting Standards  There are no recently issued accounting standards for which the Company expects a material impact on our consolidated financial statements. In addition, for the six months ended April 30, 2013, the Company has not adopted any new accounting guidance that has had a material impact on our consolidated financial statements. |

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The entire disclosure for the general note to the financial statements for the reporting entity which may include, descriptions of the basis of presentation, business description, significant accounting policies, consolidations, reclassifications, new pronouncements not yet adopted and changes in accounting principles.
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