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Equity and Distributions, Noncontrolling Interests (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Breviloba LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest | $ 440.7 |
Pascagoula Gas Processing LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest | $ 36.0 |
Whitehorn Pipeline Company LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  | $ 189.6
Altus Midstream Processing LP [Member] | Breviloba LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 33.00% |
Third Coast Midstream, LLC [Member] | Pascagoula Gas Processing LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 25.00% |
Lavaca Pipe Line Company [Member] | Baymark Pipeline LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 30.00% |
Western Gas Partners, LP [Member] | Whitehorn Pipeline Company LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 20.00% |
Navigator Ethylene Terminals LLC [Member] | Enterprise Navigator Ethylene Terminal LLC [Member] |  |
Noncontrolling Interest |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 50.00% |

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