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Acquisitions And Divestitures (Purchase Price Allocation Of Enlink's Acquisition Activity) (Details) - USD ($) $ in Millions |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 16, 2015 | Jan. 31, 2015 | May. 31, 2015 | Feb. 28, 2015 | Sep. 30, 2015 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 5,775 | $ 6,303
EnLink [Member] | LPC Crude Oil Marketing LLC [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash |  | $ 108 |  |  |  |
PP&E |  | 30 |  |  |  |
Goodwill |  | 30 |  |  |  |
Intangibles |  | 43 |  |  |  |
Current assets |  | $ 5 |  |  |  |
EnLink [Member] | Coronado Midstream Holdings LLC [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash | $ 240 |  |  |  |  |
Common units value | 360 |  |  |  |  |
PP&E | 302 |  |  |  |  |
Goodwill | 18 |  |  |  |  |
Intangibles | 281 |  |  |  |  |
Current liabilities | $ (1) |  |  |  |  |
EnLink [Member] | EnLink Midstream Holdings [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Common units value |  |  | $ 900 | $ 925 |  |

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