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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, 2018 | Mar. 31, 2017
Revenue [Abstract] |  |  |  |
Revenues | $ 9,298.5 | [1] | $ 7,320.4 | [2]
Sales of Products [Member] | Revenues [Member] | Product Concentration Risk [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Concentration risk percentage | 86.00% |  | 86.00% |
Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Percentage increase in revenues due to addition of revenue stream for non-cash consideration | 1.00% |  |  |
Midstream Services [Member] | Revenues [Member] | Product Concentration Risk [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Concentration risk percentage | 14.00% |  | 14.00% |
NGL Pipelines & Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | $ 3,413.3 | [1] | $ 3,345.8 | [2]
NGL Pipelines & Services [Member] | Sales of NGLs and Related Products [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 2,815.4 | [1] | 2,887.2 | [2]
NGL Pipelines & Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 597.9 | [1] | 458.6 | [2]
Crude Oil Pipelines & Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 3,570.9 | [1] | 1,807.2 | [2]
Crude Oil Pipelines & Services [Member] | Sales of Crude Oil [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 3,341.7 | [1] | 1,618.6 | [2]
Crude Oil Pipelines & Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 229.2 | [1] | 188.6 | [2]
Natural Gas Pipelines & Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 804.8 | [1] | 761.2 | [2]
Natural Gas Pipelines & Services [Member] | Sales of Natural Gas [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 560.0 | [1] | 544.0 | [2]
Natural Gas Pipelines & Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 244.8 | [1] | 217.2 | [2]
Petrochemical & Refined Products Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 1,509.5 | [1] | 1,406.2 | [2]
Petrochemical & Refined Products Services [Member] | Sales of Petrochemical and Refined Products [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | 1,289.3 | [1] | 1,211.1 | [2]
Petrochemical & Refined Products Services [Member] | Midstream Services [Member] |  |  |  |
Revenue [Abstract] |  |  |  |
Revenues | $ 220.2 | [1] | $ 195.1 | [2]
[1] | Revenues are accounted for under ASC 606 upon implementation at January 1, 2018.
[2] | Revenues are accounted for under ASC 605 for historical periods prior to January 1, 2018.

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