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Advances to and Investments in Unconsolidated Affiliates Investment in Affiliates (Carrying Values) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Investments in unconsolidated affiliates |  | $ 2,893 | $ 2,947 | $ 3,060
Equity in earnings of unconsolidated affiliates |  | 257 | 246 | 119
Impairment losses and other |  | 386 | 21 | 2,880
Other Affiliates [Member] |  |  |  |
Equity in earnings of unconsolidated affiliates | [1] | 89 | 82 | (74)
Citrus [Member] |  |  |  |
Investments in unconsolidated affiliates |  | 1,800 | 1,792 |
Equity in earnings of unconsolidated affiliates |  | 141 | 157 | 162
MEP [Member] |  |  |  |
Investments in unconsolidated affiliates |  | 360 | 378 |
Equity in earnings of unconsolidated affiliates |  | 10 | (17) | (6)
White Cliffs |  |  |  |
Investments in unconsolidated affiliates |  | 218 | 245 |
Equity in earnings of unconsolidated affiliates |  | (8) | 0 | 20
Other |  |  |  |
Investments in unconsolidated affiliates |  | 446 | 461 |
FEP [Member] |  |  |  |
Impairment losses and other |  | 208 |  |
Explorer |  |  |  |
Investments in unconsolidated affiliates |  | 69 | 71 |
Equity in earnings of unconsolidated affiliates |  | $ 25 | $ 24 | $ 17
[1] | For the year ended December 31, 2020, equity in earnings (losses) of unconsolidated affiliates includes the impact of non-cash impairments recorded by FEP, which reduced the Partnership’s equity in earnings by $208 million.

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