| **Segment Reporting (Tables)**                         | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                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| **Segment Reporting [Abstract]**                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   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| Schedule of selected financial information, by segment | The following tables present selected financial information for our reporting segments:(in millions)Truck Engine Parts FinancialServices(A)Corporate and Eliminations TotalThree Months Ended April 30, 2013           External sales and revenues, net$1,515 $458 $514 $39 $— $2,526Intersegment sales and revenues4 286 16 19 (325) —Total sales and revenues, net$1,519 $744 $530 $58 $(325) $2,526            Income (loss) from continuing operations attributable to NIC, net of tax$(109) $(138) $91 $19 $(216) $(353)Income tax expense— — — — (22) (22)Segment profit (loss)$(109) $(138) $91 $19 $(194) $(331)            Depreciation and amortization(B)$92 $33 $2 $10 $5 $142Interest expense— — — 17 73 90Equity in income (loss) of non-consolidated affiliates— 1 3 — — 4Capital expenditures(B)(C)16 16 — 1 2 35(in millions)Truck Engine Parts FinancialServices(A) Corporate and Eliminations TotalThree Months Ended April 30, 2012           External sales and revenues, net$2,316 $440 $462 $43 $— $3,261Intersegment sales and revenues2 454 34 24 (514) —Total sales and revenues, net$2,318 $894 $496 $67 $(514) $3,261            Income (loss) from continuing operations attributable to NIC, net of tax$(45) $(108) $41 $26 $(52) $(138)Income tax benefit— — — — 123 123Segment profit (loss)$(45) $(108) $41 $26 $(175) $(261)            Depreciation and amortization(B)$35 $30 $4 $8 $5 $82Interest expense— — — 22 40 62Equity in income (loss) of non-consolidated affiliates(6) — 2 — — (4)Capital expenditures(B)(C)16 36 5 1 15 73(in millions)Truck Engine Parts FinancialServices(A) Corporate and Eliminations TotalSix Months Ended April 30, 2013           External sales and revenues, net$3,171 $870 $1,044 $78 $— $5,163Intersegment sales and revenues26 614 38 39 (717) —Total sales and revenues, net$3,197 $1,484 $1,082 $117 $(717) $5,163            Income (loss) from continuing operations attributable to NIC, net of tax$(167) $(165) $177 $41 $(353) $(467)Income tax expense— — — — (37) (37)Segment profit (loss)$(167) $(165) $177 $41 $(316) $(430)            Depreciation and amortization(B)$134 $72 $5 $19 $12 $242Interest expense— — — 35 129 164Equity in income (loss) of non-consolidated affiliates— (1) 4 — — 3Capital expenditures(B)(C)31 69 1 1 5 107(in millions)Truck Engine Parts FinancialServices(A) Corporate and Eliminations TotalSix Months Ended April 30, 2012           External sales and revenues, net$4,427 $860 $896 $87 $— $6,270Intersegment sales and revenues13 893 69 48 (1,023) —Total sales and revenues, net$4,440 $1,753 $965 $135 $(1,023) $6,270            Income (loss) from continuing operations attributable to NIC, net of tax$(72) $(228) $91 $53 $(126) $(282)Income tax benefit— — — — 199 199Segment profit (loss)$(72) $(228) $91 $53 $(325) $(481)            Depreciation and amortization(B)$69 $59 $6 $16 $10 $160Interest expense— — — 47 76 123Equity in income (loss) of non-consolidated affiliates(15) 1 3 — — (11)Capital expenditures(B)(C)32 76 12 2 54 176(in millions)Truck(B) Engine Parts Financial Services Corporate and Eliminations TotalSegment assets, as of:           April 30, 2013$2,139 $1,738 $709 $2,518 $1,619 $8,723October 31, 2012$2,118 $1,777 $707 $2,563 $1,937 $9,102_________________________(A)Total sales and revenues in the Financial Services segment include interest revenues of $46 million and $93 million for the three and six months ended April 30, 2013, respectively, and $56 million and $114 million for three and six months ended April 30, 2012, respectively. (B)Includes amounts related to discontinued operations. For more information, see Note 2, Discontinued Operations and Other Divestitures.(C)Exclusive of purchases of equipment leased to others. |

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| - Definition
Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599
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