| **Debt**                       | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Debt Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Debt                           | Debt(in millions)April 30, 2016October 31, 2015Manufacturing operations   Senior Secured Term Loan Credit Facility, as amended, due 2020, net of unamortized discount of $15 and $17, respectively$1,022 $1,0238.25% Senior Notes, due 2022, net of unamortized discount of $17 and $18, respectively1,183 1,1824.50% Senior Subordinated Convertible Notes, due 2018, net of unamortized discount of $12 and $14, respectively188 1864.75% Senior Subordinated Convertible Notes, due 2019, net of unamortized discount of $28 and $32, respectively383 379Debt of majority-owned dealerships13 28Financing arrangements and capital lease obligations46 49Loan Agreement related to 6.5% Tax Exempt Bonds, due 2040225 225Financed lease obligations75 111Other16 15Total Manufacturing operations debt3,151 3,198Less: Current portion83 103Net long-term Manufacturing operations debt$3,068 $3,095(in millions)April 30, 2016 October 31, 2015Financial Services operations   Asset-backed debt issued by consolidated SPEs, at fixed and variable rates, due serially through 2021$933 $870Bank credit facilities, at fixed and variable rates, due dates from 2016 through 2021947 1,063Commercial paper, at variable rates, program matures in 201788 86Borrowings secured by operating and finance leases, at various rates, due serially through 2021106 81Total Financial Services operations debt2,074 2,100Less: Current portion1,168 1,007Net long-term Financial Services operations debt$906 $1,093Financial Services OperationsAsset-backed DebtIn April 2016, Truck Retail Accounts Corporation ("TRAC"), one of our consolidated SPEs, renewed its $100 million revolving facility for one year, to April 2017. Borrowings under this facility are secured by eligible retail accounts receivable. In February 2016, the maximum capacity of NFC’s wholesale variable funding notes ("VFN") facility was increased from $375 million to $500 million. The VFN facility is secured by assets of the wholesale note owner trust. In May 2016, the maturity date of the VFN facility was extended from October 2016 to May 2017.Bank Credit FacilitiesIn May 2016, NFC amended and extended its 2011 bank credit facility which was originally due in December 2016. The 2016 amendment extends the maturity date to June 2018 and initially reduces the revolving portion of the facility from $500 million to $400 million. The revolving portion will be further reduced to approximately $275 million effective in December 2016.  The amendment also provides for a reduction in the term loan facility, which was previously $229 million, to approximately $82 million, effective in December 2016, at which time the quarterly principal payments are reduced from $9 million to $2 million. The amendment allows NFC to increase revolving or term loan commitments, subject to obtaining commitments from existing or new lenders to provide additional or increased revolving commitments and/or additional term loans, to permit a maximum total facility size of $700 million after giving effect to any such increase and without taking into account the non-extended loans and commitments. The portion of the outstanding amount as of April 30, 2016 that matures in June 2018 is classified as Long-term debt on our Consolidated Balance Sheets.In March 2016, NFC paid $30 million in cash dividends to Navistar, Inc. Dividends and certain affiliate loans are subject to the restricted payment covenants set forth in the NFC bank credit facility. |

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| - References
No definition available.
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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 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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