The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Name FASB Interpretation (FIN)

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-Paragraph 13

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

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- Definition

For investments which are quantified by principal amount, the principle balance held at close of period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 320

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-Subparagraph (SX 210.12-14.Column B)

-URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611322-123010

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-Publisher SEC

-Name Regulation S-X (SX)

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-Section 14

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-Article 12

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Accidental Gasoline Leak

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This element represents the ruling of a court for a litigated item. The expense/liability may or may not have been recognized in the financial statements and may or may not be subject to appeal.

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Percentage Ownership Interest Of Overseas Project Before Nationalization Decree By Foreign Nation

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Litigation And Other Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Jun. 30, 2011 gal	May 01, 2007	Sep. 30, 2011 Equity Company Obligations [Member]	Sep. 30, 2011 Guarantees, Notes, Loans And Performance [Member]	Jun. 27, 2007 Expropriation Of Assets [Member]	Jun. 30, 2011 Compensatory Damages [Member]	Jun. 30, 2011 Punitive Damages [Member]
Total guarantees	$ 7,783			$ 5,047	$ 7,783
Percentage ownership interest in Cerro Negro Project			41.67%			41.67%
Net book investment in Cerro Negro project	750
Accidental gasoline leak (gallons)		26,000
Litigation court verdict							$ 497	$ 1,000