PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Pensions
Defined Benefit Plan Disclosure
Service cost	$ 50	$ 42	$ 149	$ 129
Interest cost	124	126	372	382
Expected return on plan assets	(199)	(189)	(597)	(570)
Amortization of actuarial loss	39	28	112	87
Amortization of prior service cost (credit)	10	10	31	31
Settlements/curtailments	1	14	1	17
Net cost	25	31	68	76
Defined benefit plan employer contributions			58
Defined benefit plan employer contributions expected for the remainder of the fiscal year	24		24
Health Care and Life Insurance
Defined Benefit Plan Disclosure
Service cost	11	11	33	33
Interest cost	81	84	244	252
Expected return on plan assets	(28)	(30)	(85)	(91)
Amortization of actuarial loss	68	78	203	233
Amortization of prior service cost (credit)	(4)	(5)	(11)	(12)
Net cost	128	138	384	415
Defined benefit plan employer contributions			34
Defined benefit plan employer contributions expected for the remainder of the fiscal year	$ 9		$ 9

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

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

+ References

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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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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.

+ References

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The aggregate 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 (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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