Pension And Other Postretirement Benefits (Expected Contribution Pension Benefits And Other Postretirement Benefits) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Pension Benefits - U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions expected in 2012	$ 1,650
Benefits payments expected in 2012	1,490
Benefits payments expected in 2013	1,579
Benefits payments expected in 2014	1,547
Benefits payments expected in 2015	1,524
Benefits payments expected in 2016	1,489
Benefits payments expected in 2017-2021	6,616
Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions expected in 2012	1,250
Benefits payments expected in 2012	1,342
Benefits payments expected in 2013	1,360
Benefits payments expected in 2014	1,383
Benefits payments expected in 2015	1,418
Benefits payments expected in 2016	1,462
Benefits payments expected in 2017-2021	7,731
Gross Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits payments expected in 2012	442
Benefits payments expected in 2013	458
Benefits payments expected in 2014	472
Benefits payments expected in 2015	485
Benefits payments expected in 2016	497
Benefits payments expected in 2017-2021	2,611
Other Postretirement Benefits Medicare Subsidy Receipt [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefits payments expected in 2012	23
Benefits payments expected in 2013	25
Benefits payments expected in 2014	26
Benefits payments expected in 2015	27
Benefits payments expected in 2016	28
Benefits payments expected in 2017-2021	$ 163

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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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

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- Definition

The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

+ 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 the benefits expected to be paid in Year 5.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

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- Definition

The amount of the benefits expected to be paid in Year 4.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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- Definition

The amount of the benefits expected to be paid in Year 1.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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The amount of the benefits expected to be paid in Year 3.

+ 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 benefits expected to be paid in Year 2.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

Aggregate amount for the next five fiscal years following the first five fiscal years (that is the aggregate of fiscal years six through ten) following the balance sheet date of the prescription drug subsidy receipts expected to be received.

+ References

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Amount of the prescription drug subsidy receipts expected to be received in Year 5 after the balance sheet date.

+ References

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Amount of the prescription drug subsidy receipts expected to be received in Year 4 after the balance sheet date.

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Amount of the prescription drug subsidy receipts expected to be received in Year 1 after the balance sheet date.

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Amount of the prescription drug subsidy receipts expected to be received in Year 3 after the balance sheet date.

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Amount of the prescription drug subsidy receipts expected to be received in Year 2 after the balance sheet date.

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