Postretirement Benefits - Net Postretirement Benefits Expense and Other Amounts Recognized (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Pension and Other Postretirement Benefit Expense [Abstract]
Net postretirement benefits expense	$ 177	$ 203	$ 169
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Prior service cost (benefit)			(302)
Pension Plan, Defined Benefit [Member]
Pension and Other Postretirement Benefit Expense [Abstract]
Service cost for benefits earned during the period	20	17	17
Interest on obligation	143	169	189
Amortization of cumulative loss	(128)	(112)	(97)
Amortization of prior service cost (benefit)	1	1	1
Curtailments	(4)	(5)	(2)
Contractual termination benefits	0	2	38
Retrospective payments to retirees	0	0	0
Premiums on pension insurance	9	8	6
Expected return on assets	189	192	211
Net postretirement benefits expense	116	122	139
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Actuarial net loss (gain)	422	(469)	(374)
Amortization of cumulative loss	(128)	(112)	(97)
Prior service cost (benefit)	(1)	(1)	0
Amortization of prior service benefit (cost)	(1)	(1)	(1)
Curtailments	33	0	13
Currency translation	0	(2)	(4)
Total recognized in other comprehensive loss (income)	(585)	357	267
Total net postretirement benefits expense and other comprehensive loss (income)	(469)	479	406
Other Postretirement Benefit Plan, Defined Benefit [Member]
Pension and Other Postretirement Benefit Expense [Abstract]
Service cost for benefits earned during the period	7	7	8
Interest on obligation	62	83	56
Amortization of cumulative loss	(29)	(38)	(4)
Amortization of prior service cost (benefit)	(4)	(5)	(29)
Curtailments	0	3	(11)
Contractual termination benefits	0	(2)	6
Retrospective payments to retirees	0	(2)	15
Premiums on pension insurance	0	0	0
Expected return on assets	33	35	41
Net postretirement benefits expense	61	81	30
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Actuarial net loss (gain)	175	58	(566)
Amortization of cumulative loss	(29)	(38)	(4)
Prior service cost (benefit)	0	0	302
Amortization of prior service benefit (cost)	4	5	29
Curtailments	0	(3)	0
Currency translation	0	0	0
Total recognized in other comprehensive loss (income)	(200)	(88)	893
Total net postretirement benefits expense and other comprehensive loss (income)	$ (139)	$ (7)	$ 923

Defined Benefit Plan, Retrospective Payments To Retirees

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Net postretirement benefit expense (income) and other comprehensive loss (income)

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No definition available.

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Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Currancy Translation Adjustment, before Tax

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- Definition

The amount of gains or losses recognized in net periodic benefit cost.

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- Definition

The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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- Definition

If applicable, the cost of providing special or contractual termination benefits recognized during the period on the projected benefit obligation.

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Return on Plan Assets

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-Section 50

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-Subparagraph (h)(3)

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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- Definition

Amount of other defined benefit plan costs.

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No definition available.

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- Definition

Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(1)

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-Glossary Service Cost (Component of Net Periodic Pension Cost)

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Amount before tax of cost (credit) of benefit changes attributable to plan participants' prior service resulting from a plan amendment or plan initiation that has not been recognized in net periodic benefit cost (credit).

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Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

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Amount before tax of gain (loss) adjustment to other comprehensive income (loss) resulting from settlement or curtailment of defined benefit pension and other postretirement defined benefit plans.

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-Publisher FASB

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-Subparagraph (h)(7)

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-Glossary Plan Curtailment

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-Glossary Settlement of a Pension or Postretirement Benefit Obligation

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Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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-Publisher FASB

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-Subparagraph (i-k)

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Amount before tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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