| **Postretirement Benefits**                           | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 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| **Compensation and Retirement Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    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| Postretirement Benefits                               | Postretirement BenefitsDefined Benefit PlansWe provide postretirement benefits to a substantial portion of our employees and retirees. Costs associated with postretirement benefits include pension and postretirement health care expenses for employees, retirees, surviving spouses and dependents.Generally, the pension plans are non-contributory. Our policy is to fund the pension plans in accordance with applicable U.S. and Canadian government regulations and to make additional contributions from time to time. For the three and nine months ended July 31, 2015, we contributed $11 million and $73 million, respectively, and for the three and nine months ended July 31, 2014, we contributed $33 million and $98 million, respectively, to our pension plans to meet regulatory funding requirements.  In August 2014, the Highway and Transportation Funding Act of 2014 ("HATFA"), including extension of pension funding interest rate relief, was signed into law.  As a result, we lowered our future funding expectations in 2014. We currently anticipate additional contributions of $40 million to our pension plans during the remainder of 2015. We primarily fund other post-employment benefit ("OPEB") obligations, such as retiree medical, in accordance with a 1993 Settlement Agreement (the "1993 Settlement Agreement"), which requires us to fund a portion of the plans' annual service cost to a retiree benefit trust (the "Base Trust"). The 1993 Settlement Agreement resolved a class action lawsuit originally filed in 1992 regarding the restructuring of the Company's then applicable retiree health care and life insurance benefits. Contributions for the nine months ended July 31, 2015 and 2014, as well as anticipated contributions for the remainder of 2015, are not material.Components of Net Periodic Benefit Expense Net postretirement benefits expense included in our Consolidated Statements of Operations is comprised of the following: Three Months Ended July 31, Nine Months Ended July 31, Pension Benefits Health and LifeInsurance Benefits Pension Benefits Health and LifeInsurance Benefits(in millions)2015 2014 2015 2014 2015 2014 2015 2014Service cost for benefits earned during the period$3 $3 $2 $2 $9 $9 $5 $4Interest on obligation35 39 17 17 106 118 53 51Amortization of cumulative loss25 23 10 4 74 70 29 12Amortization of prior service benefit— — (1) (1) — — (3) (3)Contractual termination benefits— 14 — — (1) 14 (1) —Premiums on pension insurance3 — — — 8 — — —Expected return on assets(48) (48) (7) (8) (145) (144) (22) (24)Net postretirement benefits expense$18 $31 $21 $14 $51 $67 $61 $40Based on a ruling received from the Financial Services Tribunal in Ontario, Canada, in the third quarter of 2014, the Company recognized contractual termination charges of $14 million related to the 2011 closure of its Chatham, Ontario plant.  The Company appealed this ruling, but it was upheld in a July 3, 2015 decision issued by the Divisional Court of Ontario.  On July 23, 2015, the Company filed a notice of motion for leave to appeal to the Court of Appeal for Ontario. The appeal was perfected on August 25, 2015 through an additional filing. These charges were in addition to the previous curtailment and contractual termination charges recognized in the third quarter of 2011.  There was also a remeasurement of the pension plan for hourly employees during the third quarter of 2014.  The discount rate used to measure the pension benefit obligation was 3.8% at remeasurement, compared to 4.1% at October 31, 2013.  As a result of the plan remeasurement, net actuarial gains of $10 million were recognized as a component of Accumulated other comprehensive income (loss) in the third quarter of 2014.  See Note 2, Restructurings and Impairments for further discussion.Defined Contribution Plans and Other Contractual ArrangementsOur defined contribution plans cover a substantial portion of domestic salaried employees and certain domestic represented employees. The defined contribution plans contain a 401(k) feature and provide most participants with a matching contribution from the Company. The Company deposits the matching contribution annually. Many participants covered by the plans receive annual Company contributions to their retirement accounts based on an age-weighted percentage of the participant's eligible compensation for the calendar year. Defined contribution expense pursuant to these plans was $7 million and $24 million in the three and nine months ended July 31, 2015, respectively, and $6 million and $21 million for the three and nine months ended July 31, 2014, respectively. In accordance with the 1993 Settlement Agreement, an independent Retiree Supplemental Benefit Trust (the "Supplemental Trust") was established. The Supplemental Trust, and the benefits it provides to certain retirees pursuant to a certain Retiree Supplemental Benefit Program under the 1993 Settlement Agreement ("Supplemental Benefit Program"), is not part of the Company's consolidated financial statements. The Company's contingent profit sharing obligations under a certain Supplemental Benefit Trust Profit Sharing Plan ("Supplemental Benefit Trust Profit Sharing Plan") will continue until certain funding targets defined by the 1993 Settlement Agreement are met. We have recorded no profit sharing accruals based on the operating performance of the entities that are included in the determination of qualifying profits. For more information, see Note 11, Commitments and Contingencies, for a discussion of pending arbitration regarding the Supplemental Benefit Profit Sharing Plan. |

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| - References
No definition available.
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| - Definition
The entire disclosure for pension and other postretirement benefits.
+ References
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