Retirement and Post-Retirement Benefit Plans (Details 2) (USD $) In Millions	3 Months Ended	9 Months Ended
Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010
Pension Plans
Employer Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2011					$ 747
Contributions to benefit plans			323
Expected contribution to benefit plans as of balance sheet date	424		424
U.S. Defined Benefit Plans
Net benefit (gain) cost
Service cost		1	1	1
Interest cost	148	144	445	433
Expected return on plan assets	(186)	(166)	(558)	(497)
Amortization and deferrals:
Actuarial loss	9	7	25	21
Net periodic benefit (gain) cost	(29)	(14)	(87)	(42)
Settlement loss (gain)		4		4
Net benefit (gain) cost	(29)	(10)	(87)	(38)
Non-U.S. Defined Benefit Plans
Net benefit (gain) cost
Service cost	90	80	264	248
Interest cost	178	157	524	494
Expected return on plan assets	(227)	(181)	(665)	(567)
Amortization and deferrals:
Actuarial loss	57	51	180	160
Prior service benefit	(3)	(3)	(10)	(7)
Net periodic benefit (gain) cost	95	104	293	328
Settlement loss (gain)		(2)	2	(2)
Special termination benefits	4	7	12	18
Net benefit (gain) cost	99	109	307	344
U.S. non-qualified plan participants
Employer Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2011					30
Contributions to benefit plans			19
Expected contribution to benefit plans as of balance sheet date	11		11
Post-Retirement Benefit Plans
Net benefit (gain) cost
Service cost	2	3	7	9
Interest cost	9	11	26	35
Expected return on plan assets	(9)	(9)	(27)	(24)
Amortization and deferrals:
Actuarial loss	0	2	1	12
Prior service benefit	(20)	(21)	(62)	(64)
Net periodic benefit (gain) cost	(18)	(14)	(55)	(32)
Curtailment gain				(13)
Net benefit (gain) cost	(18)	(14)	(55)	(45)
Employer Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2011					40
Contributions to benefit plans			20
Expected contribution to benefit plans as of balance sheet date	$ 20		$ 20

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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current remaining fiscal period. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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- Definition

The total amount of net periodic benefit cost (credit) for defined benefit plans for the period, before gain or loss due to settlements or curtailments.

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- Definition

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

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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- Definition

The amount of contributions made by the employer.

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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

+ References

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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

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-Publisher FASB
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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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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 or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments).

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- Definition

The amount of net gain or loss recognized in net periodic benefit cost as a result of 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 88
-Paragraph 6

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-Name Statement of Financial Accounting Standard (FAS)
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The amount of net (gain) loss recognized in net periodic benefit cost as a result of 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 (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts to cover vested benefits.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Publisher FASB
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Name Statement of Financial Accounting Standard (FAS)
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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.

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The amount of increase related to special termination benefits offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. A situation involving termination benefits may also involve a curtailment.

+ References

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-Name Statement of Financial Accounting Standard (FAS)
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