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Intangible Assets and Goodwill, Significant Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 4,899.6 | $ 5,135.8 |
Accumulated Amortization | (1,749.0) | (1,826.7) |
Carrying Value | 3,150.6 | $ 3,309.1 | $ 3,449.0
Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Carrying Value | 2,960.0 |  |
Customer relationship intangibles [Member] | EFS Midstream [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,409.8 |  |
Accumulated Amortization | (222.9) |  |
Carrying Value | $ 1,186.9 |  |
Weighted Average Remaining Amortization Period | 20 years 4 months 24 days |  |
Customer relationship intangibles [Member] | State Line and Fairplay [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 895.0 |  |
Accumulated Amortization | (251.1) |  |
Carrying Value | $ 643.9 |  |
Weighted Average Remaining Amortization Period | 25 years 2 months 12 days |  |
Customer relationship intangibles [Member] | San Juan Gathering [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 331.3 |  |
Accumulated Amortization | (253.2) |  |
Carrying Value | $ 78.1 |  |
Weighted Average Remaining Amortization Period | 17 years 9 months 18 days |  |
Customer relationship intangibles [Member] | Oiltanking Partners L.P. [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 1,192.5 |  |
Accumulated Amortization | (203.8) |  |
Carrying Value | $ 988.7 |  |
Weighted Average Remaining Amortization Period | 22 years |  |
Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Carrying Value | $ 192.0 |  |
Contract-based intangibles [Member] | Oiltanking Partners L.P. [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 293.3 |  |
Accumulated Amortization | (275.2) |  |
Carrying Value | $ 18.1 |  |
Weighted Average Remaining Amortization Period | 2 years 6 months |  |
Contract-based intangibles [Member] | Jonah Gas Gathering [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 224.4 |  |
Accumulated Amortization | (179.4) |  |
Carrying Value | $ 45.0 |  |
Weighted Average Remaining Amortization Period | 20 years |  |
Contract-based intangibles [Member] | Delaware Basin Gas Processing LLC [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 82.6 |  |
Accumulated Amortization | (32.3) |  |
Carrying Value | $ 50.3 |  |
Weighted Average Remaining Amortization Period | 5 years |  |

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