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Revenues, Revenues by Business Segment and Revenue Type (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Revenue [Abstract] |  |
Revenues | $ 9,155.3 | $ 7,482.5
NGL Pipelines & Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 3,583.5 | 2,968.1
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member] |  |
Revenue [Abstract] |  |
Revenues | 3,005.6 | 2,419.2
NGL Pipelines & Services [Member] | Midstream Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 577.9 | 548.9
NGL Pipelines & Services [Member] | Midstream Services: Natural Gas Processing and Fractionation [Member] |  |
Revenue [Abstract] |  |
Revenues | 183.4 | 188.5
NGL Pipelines & Services [Member] | Midstream Services: Transportation [Member] |  |
Revenue [Abstract] |  |
Revenues | 274.6 | 265.0
NGL Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member] |  |
Revenue [Abstract] |  |
Revenues | 119.9 | 95.4
Crude Oil Pipelines & Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 2,165.5 | 2,038.9
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member] |  |
Revenue [Abstract] |  |
Revenues | 1,838.9 | 1,696.9
Crude Oil Pipelines & Services [Member] | Midstream Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 326.6 | 342.0
Crude Oil Pipelines & Services [Member] | Midstream Services: Transportation [Member] |  |
Revenue [Abstract] |  |
Revenues | 208.8 | 218.4
Crude Oil Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member] |  |
Revenue [Abstract] |  |
Revenues | 117.8 | 123.6
Natural Gas Pipelines & Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 1,586.8 | 670.6
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member] |  |
Revenue [Abstract] |  |
Revenues | 1,335.3 | 399.2
Natural Gas Pipelines & Services [Member] | Midstream Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 251.5 | 271.4
Natural Gas Pipelines & Services [Member] | Midstream Services: Transportation [Member] |  |
Revenue [Abstract] |  |
Revenues | 251.5 | 271.4
Petrochemical & Refined Products Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 1,819.5 | 1,804.9
Petrochemical & Refined Products Services [Member] | Sales of Petrochemicals and Refined Products [Member] |  |
Revenue [Abstract] |  |
Revenues | 1,598.9 | 1,597.5
Petrochemical & Refined Products Services [Member] | Midstream Services [Member] |  |
Revenue [Abstract] |  |
Revenues | 220.6 | 207.4
Petrochemical & Refined Products Services [Member] | Midstream Services: Fractionation and Isomerization [Member] |  |
Revenue [Abstract] |  |
Revenues | 53.5 | 35.8
Petrochemical & Refined Products Services [Member] | Midstream Services: Transportation [Member] |  |
Revenue [Abstract] |  |
Revenues | 116.7 | 134.9
Petrochemical & Refined Products Services [Member] | Midstream Services: Storage and Terminals [Member] |  |
Revenue [Abstract] |  |
Revenues | $ 50.4 | $ 36.7

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