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Revenues, Revenues by Business Segment and Revenue Type (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenue [Abstract]        
Revenues $ 10,831.3 $ 6,922.0 $ 29,436.7 $ 20,155.5
NGL Pipelines & Services [Member]        
Revenue [Abstract]        
Revenues 3,816.6 2,614.0 10,987.2 8,058.4
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member]        
Revenue [Abstract]        
Revenues 3,169.6 2,048.4 9,151.0 6,401.7
NGL Pipelines & Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 647.0 565.6 1,836.2 1,656.7
NGL Pipelines & Services [Member] | Midstream Services: Natural Gas Processing and Fractionation [Member]        
Revenue [Abstract]        
Revenues 253.6 205.4 688.5 575.8
NGL Pipelines & Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 235.0 254.7 745.1 769.6
NGL Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]        
Revenue [Abstract]        
Revenues 158.4 105.5 402.6 311.3
Crude Oil Pipelines & Services [Member]        
Revenue [Abstract]        
Revenues 3,234.6 1,521.6 7,903.6 5,023.7
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member]        
Revenue [Abstract]        
Revenues 2,890.0 1,216.1 6,868.2 4,059.7
Crude Oil Pipelines & Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 344.6 305.5 1,035.4 964.0
Crude Oil Pipelines & Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 232.9 189.3 691.4 603.5
Crude Oil Pipelines & Services [Member] | Midstream Services: Storage and Terminals [Member]        
Revenue [Abstract]        
Revenues 111.7 116.2 344.0 360.5
Natural Gas Pipelines & Services [Member]        
Revenue [Abstract]        
Revenues 979.9 606.9 3,275.8 1,862.7
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member]        
Revenue [Abstract]        
Revenues 732.2 350.7 2,543.1 1,097.6
Natural Gas Pipelines & Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 247.7 256.2 732.7 765.1
Natural Gas Pipelines & Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 247.7 256.2 732.7 765.1
Petrochemical & Refined Products Services [Member]        
Revenue [Abstract]        
Revenues 2,800.2 2,179.5 7,270.1 5,210.7
Petrochemical & Refined Products Services [Member] | Sales of Petrochemicals and Refined Products [Member]        
Revenue [Abstract]        
Revenues 2,537.8 1,966.2 6,523.6 4,593.7
Petrochemical & Refined Products Services [Member] | Midstream Services [Member]        
Revenue [Abstract]        
Revenues 262.4 213.3 746.5 617.0
Petrochemical & Refined Products Services [Member] | Midstream Services: Fractionation and Isomerization [Member]        
Revenue [Abstract]        
Revenues 81.0 54.6 214.6 129.0
Petrochemical & Refined Products Services [Member] | Midstream Services: Transportation [Member]        
Revenue [Abstract]        
Revenues 116.2 115.2 357.1 365.5
Petrochemical & Refined Products Services [Member] | Midstream Services: Storage and Terminals [Member]        
Revenue [Abstract]        
Revenues $ 65.2 $ 43.5 $ 174.8 $ 122.5