| **Postretirement Benefits (Tables)**                                                                                           | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       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| **Compensation and Retirement Disclosure [Abstract]**                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       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| 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)2014 2013 2014 2013Change in benefit obligations       Benefit obligations at beginning of year$3,943 $4,492 $1,674 $1,866Amendments— 3 — —Service cost12 20 5 7Interest on obligations158 143 68 62Actuarial loss (gain)176 (334) 319 (142)Curtailments(2) (33) — —Contractual termination benefits23 — 2 —Currency translation49 (15) — —Plan participants' contributions— — 40 28Subsidy receipts— — 34 41Benefits paid(318) (333) (185) (188)Benefit obligations at end of year$4,041 $3,943 $1,957 $1,674Change in plan assets       Fair value of plan assets at beginning of year$2,519 $2,411 $447 $437Actual return on plan assets206 284 26 66Currency translation42 (22) — —Employer contributions164 165 2 3Benefits paid(304) (319) (60) (59)Fair value of plan assets at end of year$2,627 $2,519 $415 $447Funded status at year end$(1,414) $(1,424) $(1,542) $(1,227)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] |  Pension Benefits Health and LifeInsurance Benefits(in millions)2014 2013 2014 2013Amounts recognized in our Consolidated Balance Sheets consist of:       Current liability$(15) $(14) $(79) $(73)Noncurrent liability(1,399) (1,410) (1,463) (1,154)Net liability recognized$(1,414) $(1,424) $(1,542) $(1,227)        Amounts recognized in our accumulated other comprehensive loss consist of:      Net actuarial loss$2,019 $1,947 $664 $354Net prior service cost (benefit)1 1 (6) (10)Net amount recognized$2,020 $1,948 $658 $344The estimated amounts for the defined benefit pension plans and the other postretirement benefit plans that will be amortized from AOCL into net periodic benefit expense over the next fiscal year are as follows: (in millions)Pension Benefits  Health and Life Insurance Benefits Amortization of prior service cost (benefit)$— $(4)Amortization of cumulative losses98 39                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| 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)2014 2013Projected benefit obligations$4,041 $3,943Accumulated benefit obligations4,021 3,933Fair value of plan assets2,627 2,519                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           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| 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)2014 2013 2012Pension expense$106 $116 $122Health and life insurance expense54 61 81Total postretirement benefits expense$160 $177 $203                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 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' Deficit, for the years ended October 31 is comprised of the following: Pension Benefits Health and LifeInsurance Benefits(in millions)2014 2013 2012 2014 2013 2012Service cost for benefits earned during the period$12 $20 17 $5 $7 $7Interest on obligation158 143 169 68 62 83Amortization of cumulative loss94 128 112 16 29 38Amortization of prior service cost (benefit)— 1 1 (4) (4) (5)Curtailments— 4 5 — — (3)Contractual termination benefits23 — 2 2 — (2)Retrospective payments to retirees— — — — — (2)Premiums on pension insurance12 9 8 — — —Expected return on assets(193) (189) $(192) (33) (33) (35)Net postretirement benefits expense$106 $116 $122 $54 $61 $81Other Changes in plan assets and benefit obligations recognized in other comprehensive loss (income)           Actuarial net loss (gain)$164 $(422) $469 $326 $(175) $(58)Amortization of cumulative loss(94) (128) (112) (16) (29) (38)Prior service cost (benefit)— (1) (1) — — —Amortization of prior service benefit (cost)— (1) (1) 4 4 5Curtailments— (33) — — — 3Currency translation1 — 2 — — —Total recognized in other comprehensive loss (income)$71 $(585) $357 $314 $(200) $(88)Total net postretirement benefits expense and other comprehensive loss (income)$177 $(469) $479 $368 $(139) $(7)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| 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$10 $(9)Effect on postretirement benefit obligation239 (207)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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| Schedule of Allocation of Plan Assets [Table Text Block]                                                                       |  2014 2013(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAsset Category               Cash and Cash Equivalents$16 $— $— $16 $32 $— $— $32Equity               U.S. Large Cap28 — — 28 28 — — 28U.S. Small-Mid Cap60 — — 60 69 — — 69International60 — — 60 65 — — 65Emerging Markets19 — — 19 22 — — 22Fixed Income               Corporate Bonds— 55 — 55 — 52 — 52Government Bonds— 49 — 49 — 43 — 43Asset Backed Securities— 3 — 3 — 4 — 4Collective Trusts and Other               Common Stock— 69 — 69 — 71 — 71Commodities— 10 — 10 — 13 — 13Hedge Funds— — 22 22 — — 21 21Private Equity— — 23 23 — — 26 26Total(A)$183 $186 $45 $414 $216 $183 $47 $446__________________(A)For both October 31, 2014 and 2013, the totals exclude $1 million of receivables, which are included in the change in plan asset table. The fair value of the pension and other postretirement benefit plan assets by category is summarized below: Pension Assets  2014 2013(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalAsset Category               Cash and Cash Equivalents$112 $— $— $112 $107 $— $— $107Equity               U.S. Large Cap227 — — 227 207 — — 207U.S. Small-Mid Cap313 — — 313 350 — — 350Canadian44 — — 44 93 — — 93International244 — — 244 254 — — 254Emerging Markets108 — — 108 105 — — 105Equity derivative— — (106) (106) — — (72) (72)Fixed Income               Corporate Bonds— 200 — 200 — 147 — 147Government Bonds— 630 — 630 — 494 — 494Asset Backed Securities— 8 — 8 — 8 — 8Fixed income derivative— — 1 1 — — (13) (13)Collective Trusts and Other               Common and Preferred Stock— 531 — 531 — 583 — 583Commodities— 58 — 58 — 68 — 68Hedge Funds— — 106 106 — — 101 101Private Equity— — 94 94  — 103 103Exchange Traded Funds9 — — 9 6 — — 6Mutual Funds29 — — 29 32 — — 32Real Estate— — 1 1 — — 1 1Total(A)$1,086 $1,427 $96 $2,609 $1,154 $1,300 $120 $2,574___________________(A)For October 31, 2014 and 2013, the totals exclude $9 million and $8 million of receivables, respectively, 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, 2014 and 2013, 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 other postretirement benefit assets for the years ended October 31, 2014 and 2013:(in millions)Hedge Funds Private EquityBalance at November 1, 2012$19 $23Unrealized gains2 5Realized gains— —Purchases, issuances, and settlements— (2)Balance at October 31, 2013$21 $26Unrealized gains 1 3Realized gains— 4Purchases, issuances, and settlements— (10)Balance at October 31, 2014$22 $23The 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, 2014 and 2013:(in millions)Hedge Funds Private Equity Real Estate Fixed Income Derivative Equity DerivativesBalance at November 1, 2012$92 $92 $1 $19 $4Unrealized gains (losses)8 18 — (32) (90)Realized gains1 — — 4 10Purchases, issuances, and settlements— (7) — (4) 4Balance at October 31, 2013$101 $103 $1 $(13) $(72)Unrealized gains (losses)5 10 — 14 (43)Realized gains — 15 — — —Purchases, issuances, and settlements— (34) — — 9Balance at October 31, 2014$106 $94 $1 $1 $(106)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Schedule of Expected Benefit Payments [Table Text Block]                                                                       | The expected future benefit payments for the years ending October 31, 2015 through 2019 and the five years ending October 31, 2024 are estimated as follows:(in millions)Pension Benefit Payments Other Postretirement Benefit Payments(A)2015$312 $1432016304 1322017296 1372018288 1302019280 1272020 through 20241,278 600                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Schedule of Assumptions Used [Table Text Block]                                                                                | The weighted average rate assumptions used in determining benefit obligations for the years ended October 31, 2014 and 2013 were:  Pension Benefits Health and Life Insurance Benefits 2014 2013 2014 2013Discount rate used to determine present value of benefit obligation at end of year3.7% 4.1% 3.7% 4.1%Expected rate of increase in future compensation levels3.5% 3.5% — —The weighted average rate assumptions used in determining net postretirement benefits expense for 2014, 2013, and 2012 were:  Pension Benefits Health and Life                          Insurance Benefits 2014 2013 2012 2014 2013 2012Discount rate(A)4.1% 3.2% 4.1% 4.1% 3.4% 4.2%Expected long-term rate of return on plan assets7.8% 8.0% 8.3% 7.8% 8.0% 8.3%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%.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |

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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.
+ References
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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.
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