| **Segment Reporting**            | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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| **Segment Reporting [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     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| Segment Reporting                | Segment ReportingThe following is a description of our four reporting segments:•Our Truck segment manufactures and distributes Class 4 through 8 trucks, buses, and military vehicles under the International and IC Bus ("IC") brands, and produces engines under our proprietary brand name and parts required to support the military truck lines. This segment sells its products in the U.S., Canada, and Mexico markets, as well as through our export truck business. In an effort to strengthen and maintain our dealer network, this segment occasionally acquires and operates dealer locations for the purpose of transitioning ownership.•Our Parts segment provides customers with proprietary products needed to support the International commercial truck, IC Bus, proprietary engine lines, and export parts business, as well as our other product lines. Our Parts segment also provides a wide selection of other standard truck, trailer, and engine aftermarket parts. Also included in the Parts segment are the operating results of BDP, which manages the sourcing, merchandising, and distribution of certain service parts we sell to Ford in North America. •Our Global Operations segment primarily consists of Brazil engine operations which produces diesel engines under contract manufacturing arrangements, as well as under the MWM brand, for sale to OEMs in South America. In addition, our Global Operations segment includes the operating results of our joint venture in China with Anhui Jianghuai Automobile Co ("JAC").•Our Financial Services segment provides retail, wholesale, and lease financing of products sold by the Truck and Parts segments and their dealers within the U.S. and Mexico, as well as financing for wholesale accounts and selected retail accounts receivable. This segment also facilitates financing relationships in other countries to support our Manufacturing Operations.Corporate contains those items that are not included in our four segments.Segment Profit (Loss)We define segment profit (loss) as net income (loss) attributable to NIC, excluding income tax benefit (expense). Selected financial information from our Consolidated Statements of Operations and our Consolidated Balance Sheets is as follows:(in millions)Truck Parts Global Operations FinancialServices(A) CorporateandEliminations TotalThree Months Ended January 31, 2017           External sales and revenues, net$1,017 $563 $46 $34 $3 $1,663Intersegment sales and revenues10 7 4 20 (41) —Total sales and revenues, net$1,027 $570 $50 $54 $(38) $1,663Income (loss) attributable to NIC, net of tax$(69) $149 $(4) $13 $(151) $(62)Income tax expense— — — — (4) (4)Segment profit (loss)$(69) $149 $(4) $13 $(147) $(58)Depreciation and amortization$37 $3 $3 $13 $3 $59Interest expense— — — 20 62 82Equity in income of non-consolidated affiliates1 1 1 — — 3Capital expenditures(B)43 — 1 — 2 46(in millions)Truck Parts Global Operations FinancialServices(A) CorporateandEliminations TotalThree Months Ended January 31, 2016           External sales and revenues, net$1,081 $562 $84 $35 $3 $1,765Intersegment sales and revenues51 8 8 24 (91) —Total sales and revenues, net$1,132 $570 $92 $59 $(88) $1,765Income (loss) attributable to NIC, net of tax$(51) $150 $(13) $26 $(145) $(33)Income tax benefit— — — — 5 5Segment profit (loss)$(51) $150 $(13) $26 $(150) $(38)Depreciation and amortization$34 $3 $5 $12 $4 $58Interest expense— — — 19 62 81Equity in income (loss) of non-consolidated affiliates1 1 (3) — — (1)       Capital expenditures(B)25 1 1 — 2 29(in millions)Truck Parts Global Operations FinancialServices CorporateandEliminations TotalSegment assets, as of:           January 31, 2017$1,694 $605 $354 $1,789 $952 $5,394October 31, 20161,520 594 407 2,116 1,016 5,653_________________________(A)Total sales and revenues in the Financial Services segment include interest revenues of $36 million and $42 million for the three months ended January 31, 2017 and 2016, respectively.(B)Exclusive of purchases of equipment leased to others. |

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| - Definition
The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.
+ References
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