| **Postretirement Benefits (Tables)**                                                                                           | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
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| **Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]**                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule of Defined Benefit Plans Disclosures [Table Text Block]                                                               | A summary of the changes in benefit obligations and plan assets is as follows:  Pension Benefits Health and LifeInsurance Benefits(in millions)2013 2012 2013 2012Change in benefit obligations       Benefit obligations at beginning of year$4,492 $4,171 $1,866 $2,000Amendments3 — — —Service cost20 17 7 7Interest on obligations143 169 62 83Actuarial loss (gain)(334) 462 (142) (72)Curtailments(33) 4 — —Contractual termination benefits— 2 — (3)Retrospective payments due to retirees— — — (2)Currency translation(15) (5) — —Plan participants' contributions— — 28 20Subsidy receipts— — 41 20Benefits paid(333) (328) (188) (187)Benefit obligations at end of year$3,943 $4,492 $1,674 $1,866Change in plan assets       Fair value of plan assets at beginning of year$2,411 $2,392 $437 $463Actual return on plan assets284 186 66 27Currency translation(22) (9) — —Employer contributions165 157 3 19Benefits paid(319) (315) (59) (72)Fair value of plan assets at end of year$2,519 $2,411 $447 $437Funded status at year end$(1,424) $(2,081) $(1,227) $(1,429)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Schedule of Amounts Recognized in Balance Sheet [Table Text Block]                                                             |  Pension Benefits Health and LifeInsurance Benefits(in millions)2013 2012 2013 2012Amounts recognized in our Consolidated Balance Sheets consist of:       Current liability$(14) $(14) $(73) $(92)Noncurrent liability(1,410) (2,067) (1,154) (1,337)Net liability recognized$(1,424) $(2,081) $(1,227) $(1,429)        Amounts recognized in our accumulated other comprehensive loss consist of:      Net actuarial loss$1,947 $2,529 $354 $558Net prior service cost (benefit)1 3 (10) (13)Net amount recognized$1,948 $2,532 $344 $545                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Components Of Postretirement Benefits Income Expense Included in Statement Of Operations [Table Text Block]                    | The components of our postretirement benefits expense included in our Consolidated Statements of Operations for the years ended October 31 consist of the following: (in millions)2013 2012 2011Pension expense$116 $122 $139Health and life insurance expense61 81 30Total postretirement benefits expense$177 $203 $169                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Schedule of Net Benefit Costs [Table Text Block]                                                                               | Net postretirement benefits expense included in our Consolidated Statements of Operations, and other amounts recognized in our Consolidated Statements of Stockholders' Equity (Deficit), for the years ended October 31 is comprised of the following:  Pension Benefits Health and LifeInsurance Benefits(in millions)2013 2012 2011 2013 2012 2011Service cost for benefits earned during the period$20 $17 17 $7 $7 $8Interest on obligation143 169 189 62 83 56Amortization of cumulative loss128 112 97 29 38 4Amortization of prior service cost (benefit)1 1 1 (4) (5) (29)Curtailments4 5 2 — (3) 11Contractual termination benefits— 2 38 — (2) 6Retrospective payments to retirees— — — — (2) 15Premiums on pension insurance9 8 6 — — —Expected return on assets(189) (192) (211) (33) (35) (41)Net postretirement benefits expense$116 $122 $139 $61 $81 $30Other Changes in plan assets and benefit obligations recognized in other comprehensive loss (income)           Actuarial net loss (gain)$(422) $469 $374 $(175) $(58) $566Amortization of cumulative loss(128) (112) (97) (29) (38) (4)Prior service cost (benefit)(1) (1) — — — 302Amortization of prior service benefit (cost)(1) (1) (1) 4 5 29Curtailments(33) — (13) — 3 —Currency translation— 2 4 — — —Total recognized in other comprehensive loss (income)$(585) $357 $267 $(200) $(88) $893Total net postretirement benefits expense and other comprehensive loss (income)$(469) $479 $406 $(139) $(7) $923                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] | The estimated amounts for the defined benefit pension plans and the other postretirement benefit plans that will be amortized from AOCL into net periodic benefit expense over the next fiscal year are as follows: (in millions)Pension Benefits  Health and Life Insurance Benefits Amortization of prior service cost (benefit)$— $(4)Amortization of cumulative losses94 16 Pension Benefits Health and LifeInsurance Benefits(in millions)2013 2012 2013 2012Amounts recognized in our Consolidated Balance Sheets consist of:       Current liability$(14) $(14) $(73) $(92)Noncurrent liability(1,410) (2,067) (1,154) (1,337)Net liability recognized$(1,424) $(2,081) $(1,227) $(1,429)        Amounts recognized in our accumulated other comprehensive loss consist of:      Net actuarial loss$1,947 $2,529 $354 $558Net prior service cost (benefit)1 3 (10) (13)Net amount recognized$1,948 $2,532 $344 $545                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Schedule of Assumptions Used [Table Text Block]                                                                                | The weighted average rate assumptions used in determining benefit obligations for the years ended October 31, 2013 and 2012 were:  Pension Benefits Health and Life Insurance Benefits 2013 2012 2013 2012Discount rate used to determine present value of benefit obligation at end of year4.1% 3.2% 4.1% 3.4%Expected rate of increase in future compensation levels3.5% 3.5% — —The weighted average rate assumptions used in determining net postretirement benefits expense for 2013, 2012, and 2011 were:  Pension Benefits Health and Life                          Insurance Benefits 2013 2012 2011 2013 2012 2011Discount rate(A)3.2% 4.1% 4.8% 3.4% 4.2% 4.6%Expected long-term rate of return on plan assets8.0% 8.3% 8.5% 8.0% 8.3% 8.5%Expected rate of increase in future compensation levels3.5% 3.5% 3.5% — — —________________________(A)In 2012 for pension benefits, the weighted average discount rate used to compute the expense for the period of November 1, 2011  through July 31, 2012 was 4.2%. Due to plan remeasurements at July 31, 2012 at a rate of 3.3%, the weighted average discount rate for the full fiscal year 2012 was 4.1%.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]                   | The effect of changing the health care cost trend rate by one-percentage point for each future year is as follows: (in millions)One-PercentagePoint Increase   One-PercentagePoint Decrease  Effect on total of service and interest cost components$8 $(8)Effect on postretirement benefit obligation182 (153)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| Schedule of Expected Benefit Payments [Table Text Block]                                                                       | The expected future benefit payments for the years ending October 31, 2014 through 2018 and the five years ending October 31, 2023 are estimated as follows: (in millions)Pension Benefit Payments Other Postretirement Benefit Payments(A)2014$321 $1262015313 1352016305 1282017297 1202018289 1152019 through 20231,326 532________________________(A)Payments are net of expected participant contributions and expected federal subsidy receipts.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Pension Plan, Defined Benefit [Member]                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| **Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]**                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]                          | Information for pension plans with accumulated benefit obligations in excess of plan assets were as follows: (in millions)2013 2012Projected benefit obligations$3,943 $4,492Accumulated benefit obligations3,933 4,431Fair value of plan assets2,519 2,411                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Schedule of Allocation of Plan Assets [Table Text Block]                                                                       | The fair value of the pension and other postretirement benefit plan assets by category is summarized below: Pension Assets  2013 2012(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAsset Category               Cash and Cash Equivalents$107 $— $— $107 $85 $— $— $85Equity               U.S. Large Cap207 — — 207 463 — — 463U.S. Small-Mid Cap350 — — 350 271 — — 271Canadian93 — — 93 108 — — 108International254 — — 254 186 — — 186Emerging Markets105 — — 105 101 — — 101Equity derivative— — (72) (72) — — 4 4Fixed Income               Corporate Bonds— 494 — 494 — 136 — 136Government Bonds— 147 — 147 — 547 — 547Asset Backed Securities— 8 — 8 — 9 — 9Mortgage Backed Securities— — — — — 1 — 1Fixed income derivative— — (13) (13) — — 19 19Collective Trusts and Other               Common and Preferred Stock— 583 — 583 — 244 — 244Commodities— 68 — 68 — 66 — 66Hedge Funds— — 101 101 — — 92 92Private Equity— — 103 103 — — 92 92Exchange Traded Funds6 — — 6 — — — —Mutual Funds32 — — 32 36 — — 36Real Estate— — 1 1 — — 1 1Total(A)$1,154 $1,300 $120 $2,574 $1,250 $1,003 $208 $2,461______________________(A)For both October 31, 2013 and 2012, the totals exclude $8 million  of receivables, which are included in the change in plan assets table. In addition, the table above includes the fair value of Canadian pension assets translated at the exchange rates as of October 31, 2013 and 2012, respectively, while the change in plan asset table includes the fair value of Canadian pension assets translated at historical foreign currency rates. |
| Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]                               | The table below presents the changes for those financial instruments classified within Level 3 of the valuation hierarchy for pension assets for the years ended October 31, 2013 and 2012:(in millions)Hedge Funds Private Equity Real Estate Fixed Income Derivative Equity DerivativesBalance at November 1, 2011$99 $75 $1 $— $—Unrealized gains (losses)(1) 10 — 19 4Realized gains4 — — — —Purchases, issuances, and settlements(10) 7 — — —Balance at October 31, 2012$92 $92 $1 $19 $4Unrealized gains (losses)8 18 — (32) (90)Realized gains (losses)1 — — 4 10Purchases, issuances, and settlements— (7) — (4) 4Balance at October 31, 2013$101 $103 $1 $(13) $(72)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Other Postretirement Benefit Plan, Defined Benefit [Member]                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| **Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]**                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule of Allocation of Plan Assets [Table Text Block]                                                                       | Other Postretirement Benefits 2013 2012(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAsset Category               Cash and Cash Equivalents$32 $— $— $32 $31 $— $— $31Equity               U.S. Large Cap28 — — 28 82 — — 82U.S. Small-Mid Cap69 — — 69 64 — — 64Emerging Markets22 — — 22 22 — — 22International65 — — 65 63 — — 63Fixed Income               Corporate Bonds— 52 — 52 — 49 — 49Government Bonds— 43 — 43 — 66 — 66Asset Backed Securities— 4 — 4 — 4 — 4Mortgage Backed Securities— — — — — — — —Collective Trusts and Other               Common Stock— 71 — 71 — — — —Commodities— 13 — 13 — 13 — 13Hedge Funds— — 21 21 — — 19 19Private Equity— — 26 26 — — 23 23Total(A)$216 $183 $47 $446 $262 $132 $42 $436___________________(A)For both October 31, 2013 and 2012, the totals exclude $1 million of receivables, which are included in the change in plan asset table.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]                               | The table below presents the changes for those financial instruments classified within Level 3 of the valuation hierarchy for other postretirement benefit assets for the years ended October 31, 2013 and 2012: (in millions)Hedge Funds Private EquityBalance at November 1, 2011$25 $19Unrealized gains (losses)(2) 2Realized gains2 —Purchases, issuances, and settlements(6) 2Balance at October 31, 2012$19 $23Unrealized gains (losses)2 5Realized gains— —Purchases, issuances, and settlements— (2)Balance at October 31, 2013$21 $26                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |

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| - Definition
Components Of Postretirement Benefits Income Expense Included in Statement Of Operations [Table Text Block]
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No definition available.
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| - Definition
Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets.
+ References
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| - Definition
Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans.  This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.
+ References
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| - Definition
Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income (loss) expected to be recognized as components of net periodic benefit cost over the next fiscal year, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.
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| - Definition
Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.
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| - Definition
Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.
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| - Definition
Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.
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| - Definition
Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits.
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| - Definition
Tabular disclosure of the effect of fair value measurements using significant unobservable inputs (Level 3) on changes in plan assets of pension plans and/or other employee benefit plans for the period.
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| - Definition
Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.
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| - Definition
Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.
+ References
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