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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Comprehensive Statements Of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Net gains (losses) recognized in comprehensive statements of earnings	$ 481	$ 804	$ 606	$ 43
Commodity Derivatives [Member] | Oil, Gas And NGL Derivatives [Member]
Derivatives, Fair Value [Line Items]
Net gains (losses) recognized in comprehensive statements of earnings	414	748	426	29
Commodity Derivatives [Member] | Marketing And Midstream Revenues [Member]
Derivatives, Fair Value [Line Items]
Net gains (losses) recognized in comprehensive statements of earnings	6	1	8	(2)
Interest Rate Derivatives [Member] | Other Nonoperating Items [Member]
Derivatives, Fair Value [Line Items]
Net gains (losses) recognized in comprehensive statements of earnings	(30)		(28)	1
Foreign Currency Derivatives [Member] | Other Nonoperating Items [Member]
Derivatives, Fair Value [Line Items]
Net gains (losses) recognized in comprehensive statements of earnings	$ 91	$ 55	$ 200	$ 15

X

- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



-Paragraph 4C



-Subparagraph (e)



-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

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- Definition

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+ References

No definition available.

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