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Estimates (Schedule Of Goodwill) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill [Roll Forward] |  |  |
Goodwill | $ 4,768 | $ 5,670 |
Goodwill acquired | 495 | 12 |
Goodwill, Transfers | 0 |  |
Goodwill | 4,885 | 4,768 | $ 5,670
Goodwill impairment | (378) | 895 |
Goodwill, Other Changes | 0 | (19) |
Intrastate Transportation And Storage [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 10 | 10 |
Goodwill acquired | 0 | 0 |
Goodwill, Transfers | 0 |  |
Goodwill | 10 | 10 | 10
Goodwill impairment | 0 | 0 |
Goodwill, Other Changes | 0 | 0 |
Interstate Transportation and Storage [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 196 | 458 |
Goodwill acquired | 0 | 0 |
Goodwill, Transfers | 0 |  |
Goodwill | 196 | 196 | 458
Goodwill impairment | 0 | 262 | 638
Goodwill, Other Changes | 0 | 0 |
Midstream [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 870 | 863 |
Goodwill acquired | 0 | 8 |
Goodwill, Transfers | 0 |  |
Goodwill | 492 | 870 | 863
Goodwill impairment | (378) | 0 | 32
Goodwill, Other Changes | 0 | (1) |
NGL and refined products transportation and services [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 693 | 772 |
Goodwill acquired | 0 | 0 |
Goodwill, Transfers | 0 |  |
Goodwill | 693 | 693 | 772
Goodwill impairment | 0 | 79 |
Goodwill, Other Changes | 0 | 0 |
Crude oil transportation and services [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 1,167 | 1,163 |
Goodwill acquired | 0 | 4 |
Goodwill, Transfers | 0 |  |
Goodwill | 1,167 | 1,167 | 1,163
Goodwill impairment | 0 | 0 |
Goodwill, Other Changes | 0 | 0 |
Investment In Sunoco LP [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 1,430 | 1,550 |
Goodwill acquired | 129 | 0 |
Goodwill, Transfers | 0 |  |
Goodwill | 1,559 | 1,430 | 1,550
Goodwill impairment | 0 | 387 | 641
Goodwill, Other Changes | 0 | (18) |
Investment In USAC [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 0 | 0 |
Goodwill acquired | 366 | 0 |
Goodwill, Transfers | 253 |  |
Goodwill | 619 | 0 | 0
Goodwill impairment | 0 | 0 |
Goodwill, Other Changes | 0 | 0 |
Other Segments [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 402 | 854 |
Goodwill acquired | 0 | 0 |
Goodwill, Transfers | (253) |  |
Goodwill | 149 | 402 | 854
Goodwill impairment | 0 | 452 |
Goodwill, Other Changes | $ 0 | 0 |
Continuing Operations [Member] | Investment In Sunoco LP [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill impairment |  | $ 102 | $ 227

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