Retirement and Post-Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011	Oct. 31, 2011
Amortization and deferrals:
Net gain recognized due to transfer of substitutional portion of entity's Japan pension to Japanese government			$ 28
Settlement loss related to transfer of substitutional portion of entity's Japan pension to Japanese government			150
Government subsidy related to transfer of substitutional portion of entity's Japan pension to Japanese government	178		178
Elimination of pension obligations included in government subsidy	344		344
Transfer of pension assets included in government subsidy	166		166
Pension Plans
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2012					597
Contributions to benefit plans			345
Expected contribution to benefit plans as of balance sheet date	252		252
U.S. Defined Benefit Plans
Net benefit (gain) cost
Interest cost	141	149	283	297
Expected return on plan assets	(198)	(186)	(396)	(372)
Amortization and deferrals:
Actuarial loss	11	8	21	17
Net periodic benefit (gain) cost	(46)	(29)	(92)	(58)
Net benefit (gain) cost	(46)	(29)	(92)	(58)
Non-U.S. Defined Benefit Plans
Net benefit (gain) cost
Service cost	74	89	148	174
Interest cost	174	177	349	346
Expected return on plan assets	(206)	(225)	(413)	(438)
Amortization and deferrals:
Actuarial loss	59	60	119	122
Prior service benefit	(6)	(4)	(12)	(7)
Net periodic benefit (gain) cost	95	97	191	197
Settlement (gain) loss	8	2	(20)	2
Special termination benefits	1	6	2	8
Net benefit (gain) cost	104	105	173	207
U.S. non-qualified plan participants
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2012					31
Contributions to benefit plans			15
Expected contribution to benefit plans as of balance sheet date	16		16
Post-Retirement Benefit Plans
Net benefit (gain) cost
Service cost	2	2	4	4
Interest cost	8	9	17	17
Expected return on plan assets	(9)	(9)	(18)	(18)
Amortization and deferrals:
Actuarial loss	(1)		(2)	1
Prior service benefit	(22)	(20)	(44)	(41)
Net periodic benefit (gain) cost	(22)	(18)	(43)	(37)
Net benefit (gain) cost	(22)	(18)	(43)	(37)
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2012					30
Contributions to benefit plans			14
Expected contribution to benefit plans as of balance sheet date	$ 16		$ 16

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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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Represents the gain recognized due to the transfer of the substitutional portion of entity's Japan pension to the Japanese government.

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Represents the amount of employee pension fund liabilities transferred to the Japanese government. This amount excludes any amounts related to previously accrued salary progression.

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Represents the settlement loss in relation to the transfer of the substitutional portion of entity's Japan pension to the Japanese government.

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

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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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The increase in the fair value of plan assets from 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 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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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.

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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.

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

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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.

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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 the subsidy from the transfer of employee pension fund liabilities to the Japanese government. The amount of this subsidy excludes any amounts related to previously accrued salary progression.

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