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Revenue Recognition (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total consolidated revenues | $ 8,426.6 | $ 6,886.9 | $ 6,607.6 | $ 7,320.4 | $ 6,478.8 | $ 5,920.4 | $ 5,617.8 | $ 5,005.3 | $ 29,241.5 | $ 23,022.3 | $ 27,027.9
NGL Pipelines & Services [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Sales of NGLs and related products |  |  |  |  |  |  |  |  | 10,521.3 | 8,380.5 | 8,044.8
Midstream services |  |  |  |  |  |  |  |  | 1,946.7 | 1,862.0 | 1,743.2
Total consolidated revenues |  |  |  |  |  |  |  |  | 12,468.0 | 10,242.5 | 9,788.0
Crude Oil Pipelines & Services [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Sales of crude oil |  |  |  |  |  |  |  |  | 7,365.2 | 5,802.5 | 9,732.9
Midstream services |  |  |  |  |  |  |  |  | 791.6 | 712.5 | 573.0
Total consolidated revenues |  |  |  |  |  |  |  |  | 8,156.8 | 6,515.0 | 10,305.9
Natural Gas Pipelines & Services [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Sales of natural gas |  |  |  |  |  |  |  |  | 2,238.5 | 1,591.9 | 1,722.6
Midstream services |  |  |  |  |  |  |  |  | 907.1 | 951.1 | 1,020.7
Total consolidated revenues |  |  |  |  |  |  |  |  | 3,145.6 | 2,543.0 | 2,743.3
Petrochemical & Refined Products Services [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Sales of petrochemicals and refined products |  |  |  |  |  |  |  |  | 4,696.3 | 2,921.9 | 3,333.5
Midstream services |  |  |  |  |  |  |  |  | 774.8 | 799.9 | 778.4
Total consolidated revenues |  |  |  |  |  |  |  |  | 5,471.1 | 3,721.8 | 4,111.9
Offshore Pipelines And Services [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Sales of crude oil |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 3.2
Midstream services |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 75.6
Total consolidated revenues |  |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ 78.8

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