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Equity and Distributions, Noncontrolling Interests (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Noncontrolling Interest [Roll Forward] |  |  |  |
Noncontrolling interest balance at beginning of period |  |  | $ 438.7 |
Net income attributable to noncontrolling interests | $ 25.6 | $ 21.4 | 67.3 | $ 45.6
Cash distributions paid to noncontrolling interests | (22.8) | (22.6) | (69.7) | (50.9)
Cash contributions from noncontrolling interests | 491.2 | $ 15.1 | 590.8 | $ 222.0
Other |  |  | 2.4 |
Noncontrolling interest balance at end of period | $ 1,029.5 |  | $ 1,029.5 |
Pascagoula Natural Gas Processing Facility [Member] |  |  |  |
Noncontrolling Interest |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 25.00% |  | 25.00% |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  | $ 36.0 |
Shin Oak NGL Pipeline [Member] |  |  |  |
Noncontrolling Interest |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 33.00% |  | 33.00% |
Noncontrolling Interest, Increase from Sale of Parent Equity Interest |  |  | $ 440.7 |

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