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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Comprehensive Statement Of Earnings) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivatives, Fair Value [Line Items]
Net gain (losses) recognized in comprehensive statements of earnings	$ 804	$ (168)	$ 43	$ (65)
Commodity Derivatives [Member]
Derivatives, Fair Value [Line Items]
Net gain (losses) recognized in comprehensive statements of earnings	748	(141)	29	(95)
Interest Rate Derivatives [Member]
Derivatives, Fair Value [Line Items]
Net gain (losses) recognized in comprehensive statements of earnings		1	1	1
Foreign Currency Derivatives [Member]
Derivatives, Fair Value [Line Items]
Net gain (losses) recognized in comprehensive statements of earnings	55	(28)	15	29
EnLink [Member] | Commodity Derivatives [Member]
Derivatives, Fair Value [Line Items]
Net gain (losses) recognized in comprehensive statements of earnings	$ 1		$ (2)

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=35706170&loc=SL5624171-113959

+ Details

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X

- Details

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