| **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, 2014, we contributed $33 million and $98 million, respectively, and for the three and nine months ended July 31, 2013 we contributed $29 million and $86 million, respectively, to our pension plans to meet regulatory funding requirements.  In August 2014, the Highway and Transportation Funding Act of 2014, including extension of pension funding interest rate relief, was signed into law.  As a result, we lowered our funding expectations. We currently anticipate additional contributions of $66 million to our pension plans during the remainder of 2014. 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, 2014 and 2013, as well as anticipated contributions for the remainder of 2014, are not material.Components of Net Periodic Benefit Expense (Income)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)2014 2013 2014 2013 2014 2013 2014 2013Service cost for benefits earned during the period$3 $5 $2 $1 $9 $15 $4 $5Interest on obligation39 36 17 16 118 108 51 47Amortization of cumulative loss23 31 4 7 70 95 12 22Amortization of prior service benefit— 1 (1) (1) — 1 (3) (3)Contractual termination benefits14 — — — 14 — — —Premiums on pension insurance— — — — — 1 — —Expected return on assets(48) (48) (8) (8) (144) (142) (24) (25)Net postretirement benefits expense$31 $25 $14 $15 $67 $78 $40 $46Based 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 has appealed this ruling. 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.  The effects of the remeasurement will decrease net periodic postretirement cost by approximately $1 million for the remainder of 2014.  See Note 3, 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. Effective February 1, 2013, the Company changed the timing for depositing the matching contributions to the end of the calendar year. 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 $6 million and $21 million in the three and nine months ended July 31, 2014, respectively, and $8 million and $23 million for the three and nine months ended July 31, 2013, 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 assets of the Supplemental Trust arise from three sources: (i) the Company's 1993 contribution to the Supplemental Trust of 25.5 million shares of our Class B common stock, which were subsequently sold by the Supplemental Trust prior to 2000, (ii) contingent profit-sharing contributions made by the Company pursuant to a certain Supplemental Benefit Trust Profit Sharing Plan ("Supplemental Benefit Profit Sharing Plan"), and (iii) net investment gains on the Supplemental Trust's assets, if any. The Company's contingent profit sharing obligations under the Supplemental Benefits Profit Sharing Plan will continue until certain funding targets defined by the 1993 Settlement Agreement are met ("Profit Sharing Cessation"). Upon Profit Sharing Cessation, the Company would assume responsibility for (i) establishing the investment policy for the Supplemental Trust, (ii) approving or disapproving of certain additional supplemental benefits to the extent such benefits would result in higher expenditures than those contemplated upon the Profit Sharing Cessation, and (iii) making additional contributions to the Supplemental Trust as necessary to make up for investment and/or actuarial losses.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 12, Commitments and Contingencies, for a discussion of pending litigation regarding the Supplemental Benefit Profit Sharing Plan. |

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| - Definition
The entire disclosure for pension and other postretirement benefits.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017
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