Retirement Plans (Reconciliations Of Actuarial Present Value Of Projected Benefit Obligations And Fair Value Of Plan Assets For Defined Benefit Pension Plans) (Details) (USD $) In Millions	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, ending	$ 3,872	$ 3,920
Net amount recognized in the balance sheet	732
Noncurrent liability	(736)	(612)
Projected Benefit Obligation [Member] \| U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning	3,466	3,202
Service cost	52	51
Interest cost	172	175
Actuarial (gain) loss	114	207
Benefits paid	(167)	(157)
Acquisitions/divestitures, net	0	(15)
Foreign currency translation and other	7	3
Projected benefit obligation, ending	3,644	3,466
Projected Benefit Obligation [Member] \| Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning	1,061	864
Service cost	30	24
Interest cost	50	45
Actuarial (gain) loss	(125)	112
Benefits paid	(53)	(45)
Acquisitions/divestitures, net	0	61
Foreign currency translation and other	(3)	0
Projected benefit obligation, ending	960	1,061
Fair Value Of Plan Assets [Member] \| U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(167)	(157)
Acquisitions/divestitures, net	0	0
Foreign currency translation and other	2	1
Fair value of plan assets, beginning	3,206	2,822
Actual return on plan assets	29	328
Employer contributions	112	212
Fair value of plan assets, ending	3,182	3,206
Fair Value Of Plan Assets [Member] \| Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(53)	(45)
Acquisitions/divestitures, net	0	41
Foreign currency translation and other	(1)	(11)
Fair value of plan assets, beginning	714	634
Actual return on plan assets		60
Employer contributions	30	35
Fair value of plan assets, ending	690	714
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized in the balance sheet	(462)	(260)
Noncurrent asset	0	0
Noncurrent liability	(462)	(260)
Accumulated other comprehensive loss	(1,659)	(1,439)
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized in the balance sheet	(270)	(347)
Noncurrent asset	4	5
Noncurrent liability	(274)	(352)
Accumulated other comprehensive loss	$ (240)	$ (338)

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Foreign currency translation and other.

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This represents the noncurrent liability recognized in the balance sheet that is associated with the defined benefit pension plans.

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The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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The net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions 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 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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