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Advances to and Investments in Unconsolidated Affiliates Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Impairment of investments in unconsolidated affiliates | $ 0 | $ 0 | $ 313
Impairment losses | 74 | 431 | 1,039
Advances to and investments in unconsolidated affiliates | 3,460 | 2,642 | 2,705
Equity in earnings of unconsolidated affiliates | $ 302 | $ 344 | $ 144
Citrus [Member] |  |  |
Interest ownership | 50.00% |  |
Business Acquisition, Percentage of Voting Interests Acquired | 50.00% |  |
FGT [Member] |  |  |
Percentage Ownership Operating Facility | 100.00% |  |
FEP [Member] |  |  |
Interest ownership | 50.00% |  |
Impairment of investments in unconsolidated affiliates | $ 141 |  |
Midcontinent Express Pipeline, LLC [Member] |  |  |
Interest ownership | 50.00% |  |

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