| **Segment Reporting (Tables)**                         | 9 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)North America Truck North America Parts Global Operations FinancialServices(A) CorporateandEliminations TotalThree Months Ended July 31, 2014           External sales and revenues, net$1,801 $610 $395 $38 $— $2,844Intersegment sales and revenues113 11 12 22 (158) —Total sales and revenues, net$1,914 $621 $407 $60 $(158) $2,844Income (loss) from continuing operations attributable to NIC, net of tax$(12) $127 $(2) $24 $(140) $(3)Income tax expense— — — — (14) (14)Segment profit (loss)$(12) $127 $(2) $24 $(126) $11Depreciation and amortization$41 $4 $8 $12 $6 $71Interest expense— — — 18 60 78Equity in income of non-consolidated affiliates1 1 — — — 2Capital expenditures(B)4 — 2 — 1 7(in millions)North America Truck North America Parts Global Operations FinancialServices(A) CorporateandEliminations TotalThree Months Ended July 31, 2013           External sales and revenues, net$1,761 $583 $476 $41 $— $2,861Intersegment sales and revenues135 13 23 20 (191) —Total sales and revenues, net$1,896 $596 $499 $61 $(191) $2,861Income (loss) from continuing operations attributable to NIC, net of tax$(143) $98 $(22) $23 $(193) $(237)Income tax expense— — — — (16) (16)Segment profit (loss)$(143) $98 $(22) $23 $(177) $(221)Depreciation and amortization$59 $5 $9 $10 $5 $88Interest expense— — — 17 59 76Equity in income of non-consolidated affiliates2 1 — — — 3Capital expenditures(B)20 1 4 — 4 29(in millions)North America Truck North America Parts Global Operations FinancialServices(A) CorporateandEliminations TotalNine Months Ended July 31, 2014           External sales and revenues, net$4,758 $1,818 $1,107 $115 $— $7,798Intersegment sales and revenues330 33 26 57 (446) —Total sales and revenues, net$5,088 $1,851 $1,133 $172 $(446) $7,798Income (loss) from continuing operations attributable to NIC, net of tax$(353) $357 $(185) $71 $(440) $(550)Income tax expense— — — — (25) (25)Segment profit (loss)$(353) $357 $(185) $71 $(415) $(525)Depreciation and amortization$168 $12 $24 $33 $19 $256Interest expense— — — 52 182 234Equity in income (loss) of non-consolidated affiliates3 3 (1) — — 5Capital expenditures(B)42 5 6 1 3 57(in millions)North America Truck North America Parts Global Operations FinancialServices(A) CorporateandEliminations TotalNine Months Ended July 31, 2013           External sales and revenues, net$4,694 $1,873 $1,338 $119 $— $8,024Intersegment sales and revenues382 45 60 59 (546) —Total sales and revenues, net$5,076 $1,918 $1,398 $178 $(546) $8,024Income (loss) from continuing operations attributable to NIC, net of tax$(547) $329 $— $64 $(550) $(704)Income tax expense— — — — (53) (53)Segment profit (loss)$(547) $329 $— $64 $(497) $(651)Depreciation and amortization$244 $13 $27 $29 $17 $330Interest expense— — — 52 188 240Equity in income (loss) of non-consolidated affiliates7 4 (5) — — 6Capital expenditures(B)113 2 11 1 9 136(in millions)North America Truck North America Parts Global Operations FinancialServices CorporateandEliminations TotalSegment assets, as of:           July 31, 2014$2,355 $704 $816 $2,504 $1,323 $7,702October 31, 20132,250 716 1,162 2,355 1,832 8,315_________________________(A)Total sales and revenues in the Financial Services segment include interest revenues of $44 million and $126 million for the three and nine months ended July 31, 2014, respectively and $47 million and $140 million for the three and nine months ended July 31, 2013, respectively.(B)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 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599Reference 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 Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599Reference 5: 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=d3e8736-108599
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