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Revenues, Revenues by Business Segment and Revenue Type (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenue [Abstract] |  |  |  |
Revenues | $ 7,964.1 | $ 9,585.9 | $ 24,783.9 | $ 27,351.9
Sales of Products [Member] | Revenues [Member] | Product Concentration Risk [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Concentration risk percentage | 82.00% | 85.00% | 82.00% | 85.00%
Midstream Services [Member] | Revenues [Member] | Product Concentration Risk [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Concentration risk percentage | 18.00% | 15.00% | 18.00% | 15.00%
NGL Pipelines & Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | $ 3,252.1 | $ 4,622.9 | $ 9,851.2 | $ 11,309.9
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 2,624.9 | 3,898.2 | 7,955.5 | 9,324.5
NGL Pipelines & Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 627.2 | 724.7 | 1,895.7 | 1,985.4
NGL Pipelines & Services [Member] | Midstream Services: Natural Gas Processing and Fractionation [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 279.6 | 397.2 | 837.3 | 982.2
NGL Pipelines & Services [Member] | Midstream Services: Transportation [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 248.2 | 241.8 | 767.4 | 725.5
NGL Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 99.4 | 85.7 | 291.0 | 277.7
Crude Oil Pipelines & Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 2,478.3 | 2,494.9 | 7,952.2 | 8,847.0
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 2,130.0 | 2,209.0 | 6,990.1 | 8,082.9
Crude Oil Pipelines & Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 348.3 | 285.9 | 962.1 | 764.1
Crude Oil Pipelines & Services [Member] | Midstream Services: Transportation [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 209.1 | 187.9 | 598.1 | 490.7
Crude Oil Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 139.2 | 98.0 | 364.0 | 273.4
Natural Gas Pipelines & Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 715.5 | 850.2 | 2,462.3 | 2,447.8
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 440.0 | 589.0 | 1,627.1 | 1,681.5
Natural Gas Pipelines & Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 275.5 | 261.2 | 835.2 | 766.3
Natural Gas Pipelines & Services [Member] | Midstream Services: Transportation [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 275.5 | 261.2 | 835.2 | 766.3
Petrochemical & Refined Products Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 1,518.2 | 1,617.9 | 4,518.2 | 4,747.2
Petrochemical & Refined Products Services [Member] | Sales of Petrochemicals and Refined Products [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 1,299.0 | 1,408.9 | 3,867.3 | 4,111.6
Petrochemical & Refined Products Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 219.2 | 209.0 | 650.9 | 635.6
Petrochemical & Refined Products Services [Member] | Midstream Services: Fractionation and Isomerization [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 43.2 | 45.9 | 125.5 | 146.8
Petrochemical & Refined Products Services [Member] | Midstream Services: Transportation [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 134.4 | 119.2 | 393.2 | 353.0
Petrochemical & Refined Products Services [Member] | Midstream Services: Storage and Terminals [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | $ 41.6 | $ 43.9 | $ 132.2 | $ 135.8

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