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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) |

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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=35706170&loc=SL5624171-113959 + Details
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