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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

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- 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 + Details
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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. + References No definition available. + Details
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