| **Condensed consolidating guarantor and non-guarantor financial information**            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              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| **Condensed consolidating guarantor and non guarantor financial information [Abstract]** | Â                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                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| Condensed consolidating guarantor and non-guarantor financial information                | Condensed consolidating guarantor and non-guarantor financial informationThe following tables set forth condensed consolidating balance sheets as of April 30, 2011 and October 31, 2010, and condensed consolidating statements of operations and condensed consolidating statements of cash flows for the six months ended April 30, 2011 and 2010. The information is presented as a result of Navistar, Inc.’s guarantee, exclusive of its subsidiaries, of NIC’s indebtedness under its 8.25% Senior Notes due 2021 and obligations under our Loan Agreement related to the 6.5% Tax Exempt Bonds due 2040. Navistar, Inc. is a direct wholly-owned subsidiary of NIC. None of NIC’s other subsidiaries guarantee any of these notes. The guarantees are full and unconditional. Separate financial statements and other disclosures concerning Navistar, Inc. have not been presented because management believes that such information is not material to investors. Within this disclosure only, “NIC” includes the consolidated financial results of the parent company only, with all of its wholly-owned subsidiaries accounted for under the equity method. Likewise, “Navistar, Inc.,” for purposes of this disclosure only, includes the consolidated financial results of its wholly-owned subsidiaries accounted for under the equity method and its operating units accounted for on a consolidated basis. “Non-Guarantor Subsidiaries” includes the combined financial results of all other non-guarantor subsidiaries. “Eliminations and Other” includes all eliminations and reclassifications to reconcile to the consolidated financial statements. NIC files a consolidated U.S. federal income tax return that includes Navistar, Inc. and its U.S. subsidiaries. Navistar, Inc. has a tax allocation agreement (“Tax Agreement”) with NIC which requires Navistar, Inc. to compute its separate federal income tax liability and remit any resulting tax liability to NIC. Tax benefits that may arise from net operating losses of Navistar, Inc. are not refunded to Navistar, Inc. but may be used to offset future required tax payments under the Tax Agreement. The effect of the Tax Agreement is to allow NIC, the parent company, rather than Navistar, Inc., to utilize current U.S. taxable losses of Navistar, Inc. and all other direct or indirect subsidiaries of NIC.   NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Statement of Operations for the Three Months Ended April 30, 2011          Sales and revenues, net $— $2,144 $3,238 $(2,027) $3,355Costs of products sold 17 1,987 2,681 (1,984) 2,701Restructuring charges — 2 — — 2All other operating expenses 17 338 217 (29) 543Total costs and expenses 34 2,327 2,898 (2,013) 3,246Equity in income (loss) of affiliates 120 219 (10) (345) (16)Income before income tax 86 36 330 (359) 93Income tax expense (12) (5) (36) 48 (5)Net income 74 31 294 (311) 88Less: Net income attributable to non-controlling interests — — 14 — 14Net income attributable to Navistar International Corporation $74 $31 $280 $(311) $74  NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Statement of Operations for the Six Months Ended April 30, 2011          Sales and revenues, net $— $3,831 $5,819 $(3,552) $6,098Costs of products sold — 3,553 4,846 (3,499) 4,900Restructuring charges — 23 1 — 24All other operating expenses 41 613 441 (53) 1,042Total costs and expenses 41 4,189 5,288 (3,552) 5,966Equity in income (loss) of affiliates 120 344 (20) (477) (33)Income (loss) before income tax 79 (14) 511 (477) 99Income tax benefit (expense) (11) 1 (52) 57 (5)Net income (loss) 68 (13) 459 (420) 94Less: Net income attributable to non-controlling interests — — 26 — 26Net income (loss) attributable to Navistar International Corporation $68 $(13) $433 $(420) $68   NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Balance Sheet as of April 30, 2011          Assets          Cash and cash equivalents $176 $20 $194 $— $390Marketable securities 409 — 329 — 738Restricted cash and cash equivalents 19 9 160 — 188Finance and other receivables, net 5 178 3,851 (6) 4,028Inventories — 683 1,103 (65) 1,721Investments in non-consolidated affiliates (2,746) 5,650 50 (2,851) 103Property and equipment, net — 489 995 2 1,486Goodwill — — 337 — 337Deferred taxes, net 1 10 109 (10) 110Other 248 148 471 (2) 865Total assets $(1,888) $7,187 $7,599 $(2,932) $9,966Liabilities and stockholders’ equity (deficit)          Debt $1,677 $163 $3,212 $(229) $4,823Postretirement benefits liabilities — 1,802 262 — 2,064Amounts due to (from) affiliates (5,158) 8,656 (3,582) 84 —Other liabilities 2,316 117 1,545 (219) 3,759Total liabilities (1,165) 10,738 1,437 (364) 10,646Redeemable equity securities 5 — — — 5Convertible debt 84 — — — 84Stockholders’ equity attributable to non-controlling interests — — 44 (1) 43Stockholders’ equity (deficit) attributable to Navistar International Corporation (812) (3,551) 6,118 (2,567) (812)Total liabilities and stockholders’ equity (deficit) $(1,888) $7,187 $7,599 $(2,932) $9,966   NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Statement of Cash Flows for the Six Months Ended April 30, 2011          Net cash provided by (used in) operations $(84) $61 $142 $107 $226Cash flow from investment activities          Net change in restricted cash and cash equivalents — — (8) — (8)Net sales of marketable securities (34) — (118) — (152)Capital expenditures — (104) (104) — (208)Other investing activities — (20) 14 — (6)Net cash provided by (used in) investment activities (34) (124) (216) — (374)Cash flow from financing activities          Net borrowings (repayments) of debt 27 62 (36) (107) (54)Other financing activities 28 — (32) — (4)Net cash provided by (used in) financing activities 55 62 (68) (107) (58)Effect of exchange rate changes on cash and cash equivalents — (1) 12 — 11Decrease in cash and cash equivalents during the period (63) (2) (130) — (195)Cash and cash equivalents at beginning of the period 239 22 324 — 585Cash and cash equivalents at end of the period $176 $20 $194 $— $390______________(A)Certain amounts have been revised to reflect a retrospective change in accounting principle. See Note 1, Summary of significant accounting policies.  NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Statement of Operations for the Three Months Ended April 30, 2010(A)          Sales and revenues, net $— $1,566 $2,545 $(1,368) $2,743Costs of products sold (5) 1,425 2,110 (1,341) 2,189Restructuring charges — — 3 — 3All other operating expenses 16 341 167 (32) 492Total costs and expenses 11 1,766 2,280 (1,373) 2,684Equity in income (loss) of affiliates 55 163 (5) (226) (13)Income (loss) before income tax 44 (37) 260 (221) 46Income tax benefit (expense) (1) 1 8 2 10Net income (loss) 43 (36) 268 (219) 56Less: Net income attributable to non-controlling interests — — 13 — 13Net income (loss) attributable to Navistar International Corporation $43 $(36) $255 $(219) $43 _______________(A)Certain amounts have been revised to reflect a retrospective change in accounting principle. See Note 1, Summary of significant accounting policies.  NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Statement of Operations for the Six Months Ended April 30, 2010(A)          Sales and revenues, net $— $3,055 $5,200 $(2,703) $5,552Costs of products sold (6) 2,785 4,327 (2,655) 4,451Restructuring charges (benefit) — (17) 3 — (14)All other operating expenses 33 673 365 (61) 1,010Total costs and expenses 27 3,441 4,695 (2,716) 5,447Equity in income (loss) of affiliates 91 314 (8) (416) (19)Income (loss) before income tax 64 (72) 497 (403) 86Income tax benefit (expense) (2) 3 (18) 19 2Net income (loss) 62 (69) 479 (384) 88Less: Net income attributable to non-controlling interests — — 26 — 26Net income (loss) attributable to Navistar International Corporation $62 $(69) $453 $(384) $62 _______________(A)Certain amounts have been revised to reflect a retrospective change in accounting principle. See Note 1, Summary of significant accounting policies.  NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Balance Sheet as of October 31, 2010          Assets          Cash and cash equivalents $239 $22 $324 $— $585Marketable securities 375 — 211 — 586Restricted cash and cash equivalents 20 9 151 — 180Finance and other receivables, net 9 222 3,730 (15) 3,946Inventories — 644 974 (50) 1,568Goodwill — — 324 — 324Property and equipment, net — 443 1,003 (4) 1,442Investments in non-consolidated affiliates (3,006) 5,290 60 (2,241) 103Deferred taxes, net 1 1 146 (2) 146Other 266 118 467 (1) 850Total assets $(2,096) $6,749 $7,390 $(2,313) $9,730Liabilities and stockholders’ equity (deficit)          Debt $1,666 $213 $3,220 $(229) $4,870Postretirement benefits liabilities — 1,907 272 — 2,179Amounts due to (from) affiliates (5,058) 8,111 (3,140) 87 —Other liabilities 2,269 112 1,369 (145) 3,605Total liabilities (1,123) 10,343 1,721 (287) 10,654Redeemable equity securities 8 — — — 8Convertible debt — — — — —Stockholders’ equity attributable to non-controlling interest — — 49 — 49Stockholders’ equity (deficit) attributable to Navistar International Corporation (981) (3,594) 5,620 (2,026) (981)Total liabilities and stockholders’ equity (deficit) $(2,096) $6,749 $7,390 $(2,313) $9,730  NIC Navistar,Inc. Non-GuarantorSubsidiaries Eliminationsand Other Consolidated(in millions)          Condensed Consolidating Statement of Cash Flows for the Six Months Ended April 30, 2010 (Revised)(A)          Net cash provided by (used in) operations $(556) $(482) $722 $582 $266Cash flow from investment activities          Net change in restricted cash and cash equivalents 1 1 199 — 201Net increase in marketable securities (40) — (135) — (175)Capital expenditures — (23) (80) — (103)Other investing activities — (52) (24) 13 (63)Net cash used in investment activities (39) (74) (40) 13 (140)Cash flow from financing activities          Net borrowings (repayments) of debt — 541 (754) (595) (808)Other financing activities 14 — (33) — (19)Net cash provided by (used in) financing activities 14 541 (787) (595) (827)Effect of exchange rate changes on cash and cash equivalents — — (3) — (3)Decrease in cash and cash equivalents during the period (581) (15) (108)  (704)Cash and cash equivalents at beginning of the period 792 36 384 — 1,212Cash and cash equivalents at end of the period $211 $21 $276 $— $508________________ (A)Certain amounts have been revised to reflect a retrospective change in accounting principle. See Note 1, Summary of significant accounting policies. |

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| - Definition
Condensed Consolidating Guarantor and Non-Guarantor Financial Information [Abstract]
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| - Definition
Text block that encapsulates the detailed table comprising the condensed financial statements (balance sheet, income statement and statement of cash flows), normally using the registrant (parent) as the sole domain member. If condensed consolidating financial statements are being presented, other domain members (in addition to parent) such as guarantor subsidiaries, non-guarantor subsidiaries, and the consolidation eliminations, will be included in order that the respective monetary amounts for each of the domains will aggregate to the respective amounts on the consolidated financial statements. The line items are the various captions used to compile the condensed financial statements. Using extensions, most, if not all, of the elements representing condensed financial statement captions will be the same as those used for the consolidated financial statements captions.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Article 5Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 05 -Paragraph c -Article 7Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 06 -Article 9Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 24Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 12
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