Employee Benefits (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Additional Employee Benefits (Textual) [Abstract]
Estimated contributions to employee pension plans	$ 1,450
Employee Benefits (Textual) [Abstract]
Maximum annual increase percentage to company contribution for retiree medical coverage	4.00%
Estimated contributions to employee pension plans at the end of the prior year	950
Estimated contributions to US employee pension plans at the end of the prior year	650
Estimated contributions to international employee pension plans at the end of the prior year	300
Cash contributions to employee pension plans	(1,359)	(895)
Contributions to US employee pension plans	1.14
Contributions to other postretirement benefit plans	150
U.S. [Member]
Additional Employee Benefits (Textual) [Abstract]
Estimated contributions to employee pension plans	1,150
International [Member]
Additional Employee Benefits (Textual) [Abstract]
Estimated contributions to employee pension plans	300
Other Benefits [Member]
Additional Employee Benefits (Textual) [Abstract]
Estimated contributions to employee pension plans	$ 75

Additional employee benefits.

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- Definition

Contributions to employee pension plans.

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- Definition

Employee Benefits.

+ Details

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- Definition

Estimated contributions to domicile employee pension plans at end of prior year.

+ Details

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- Definition

Estimated contributions to employee pension plans at the end of the prior year.

+ Details

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- Definition

Estimated contributions to international employee pension plans at the end of the prior year.

+ Details

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- Definition

Maximum Annual Increase Percentage to Company Contribution for Retiree Medical Coverage.

+ Details

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- Definition

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

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- Definition

The amount of cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

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- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

+ Details

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