Hedging Transactions and Derivative Financial Instruments (Details) (USD $) In Millions	9 Months Ended
Sep. 30, 2011	Dec. 31, 2010
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, assets, designated and qualified, part of hedging relationship, fair value	$ 434	$ 36
Derivative instruments, liabilities, designated and qualified, part of hedging relationship, fair value	97	240
Derivative instruments, assets, not designated and qualified, part of hedging relationship, fair value	174	138
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	167	144
Cash Flow Hedging Strategy
Maximum length of time over which future cash flow exposures are hedged (in years)	3
Notional value, derivatives designated and qualifying, foreign currency cash flow hedges	6,223	3,968
Notional value, derivatives designated and qualifying, commodity cash flow hedges	24	28
Commodity contracts \| Prepaid expenses and other assets
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, assets, designated and qualified, part of hedging relationship, fair value	3	4
Derivative instruments, assets, not designated and qualified, part of hedging relationship, fair value	60	56
Commodity contracts \| Accounts payable and accrued expenses
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, liabilities, designated and qualified, part of hedging relationship, fair value	3	2
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	118	0
Interest rate swaps \| Other Assets [Member]
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, assets, designated and qualified, part of hedging relationship, fair value	242	0
Interest rate swaps \| Other Liabilities [Member]
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, liabilities, designated and qualified, part of hedging relationship, fair value	0	97
Other derivative instruments \| Prepaid expenses and other assets
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, assets, not designated and qualified, part of hedging relationship, fair value	4	17
Other derivative instruments \| Accounts payable and accrued expenses
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	4	0
Foreign currency contracts \| Prepaid expenses and other assets
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, assets, designated and qualified, part of hedging relationship, fair value	189	32
Derivative instruments, assets, not designated and qualified, part of hedging relationship, fair value	110	65
Foreign currency contracts \| Accounts payable and accrued expenses
Fair Value, Derivatives Designated and Not Designated as Hedges
Derivative instruments, liabilities, designated and qualified, part of hedging relationship, fair value	94	141
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	$ 45	$ 144

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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

-Subparagraph a

-Clause 1

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

-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.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

+ Details

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-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 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

+ References

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- Definition

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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- Definition

Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(3)

-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 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994

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- Definition

Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

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

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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

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

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