Retirement Plans (Schedule Of Net Funded Status) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31	$ 8,185
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31	2,091
Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31	3,737
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31	2,357
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	121.0	116.0	120.0
Interest cost	544.0	541.0	537.0
Actuarial (gain) loss	(212.0)	(174.0)	(160.0)
Fair value of plan assets, January 1	8,344
Company contributions	300
Fair value of plan assets, December 31		8,344
U.S. Plans [Member] \| Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(19)	(37)	(35)
U.S. Plans [Member] \| Qualified Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions	300	1,150
U.S. Plans [Member] \| Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(631)	(646)
Fair value of plan assets, January 1	8,344	6,784
Actual return on plan assets	152	1,019
Settlements	0	0
Company contributions	319	1,187
Plan merger	1	0
Effect of foreign currency exchange rate movements	0	0
Fair value of plan assets, December 31	8,185	8,344
Funded status, December 31	(2,370)	(1,480)
U.S. Plans [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31		1,880
U.S. Plans [Member] \| Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31		4,142
U.S. Plans [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, December 31	2,357	2,322
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.0	3.0	4.0
Interest cost	12.0	12.0	12.0
Actuarial (gain) loss	0	0	2.0
Non-U.S. Plans [Member] \| Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits paid	(9)	(7)
Fair value of plan assets, January 1	156	150
Actual return on plan assets	4	21
Settlements	(2)	(14)
Company contributions	12	8
Plan merger	0	0
Effect of foreign currency exchange rate movements	(6)	(2)
Fair value of plan assets, December 31	155	156
Funded status, December 31	(28)	(27)
Benefit Obligations [Member] \| U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, January 1	9,824	9,544
Service cost	121.0	116.0
Interest cost	544.0	541.0
Curtailments	0	0
Settlements	0	0
Actuarial (gain) loss	692.0	264.0
Acquisitions	0	0
Plan merger	5	0
Benefits paid	(631)	(646)
Restructuring	0	(2)
Plan amendments	0	7
Effect of foreign currency exchange rate movements	0	0
Benefit obligation, December 31	10,555	9,824
Benefit Obligations [Member] \| Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, January 1	183	186
Service cost	2.0	3.0
Interest cost	12.0	12.0
Curtailments	0	(3)
Settlements	(2)	(14)
Actuarial (gain) loss	0	11.0
Acquisitions	4	0
Plan merger	0	0
Benefits paid	(9)	(7)
Restructuring	0	0
Plan amendments	0	0
Effect of foreign currency exchange rate movements	(7)	(5)
Benefit obligation, December 31	$ 183	$ 183

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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 amount of increase in the benefit obligation attributed to business combinations.

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

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The amount of decrease that is related to 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.

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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 amount of increase or decrease in the benefit obligation attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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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 amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

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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 decrease that relates to 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.

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