Derivative Financial Instruments (Notional Values Of Outstanding Derivative Instruments In The Consolidated Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivatives in cash flow hedges: Foreign exchange	$ 357	$ 480
Derivatives in fair value hedges: Foreign exchange	127	123
Notional Amount of Derivative Instruments Designated as Net Investment Hedges	38
Derivatives in fair value not designated as hedges: Foreign exchange	359	965
Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivatives in cash flow hedges: Commodities	$ 428	$ 528

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Aggregate notional amount of all derivatives designated as a hedge of a net investment in a foreign operation. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

+ Details

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- Definition

Aggregate notional amount of all foreign currency derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

+ Details

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- Definition

Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

+ Details

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- Definition

Aggregate notional amount of all foreign currency derivatives designated as hedging instruments in fair value hedges. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

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- Definition

Aggregate notional amount of all price risk derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the number of currency units specified in the price risk derivative contract. Excludes notional amount expressed in nonmonetary terms such as for a commodity forward contract.

+ References

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