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Business Segments, Segment Reporting Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Information by business segment [Abstract] |  |  |
Segment gross operating margin | $ 1,574.7 | $ 1,473.3 |
Revenues from third parties | 9,273.8 | 7,309.6 |
Revenues from related parties | 24.7 | 10.8 |
Intersegment and intrasegment revenues | 0.0 | 0.0 |
Total revenues | 9,298.5 | 7,320.4 |
Equity in income (loss) of unconsolidated affiliates | 115.7 | 94.8 |
Property, plant and equipment, net | 36,416.3 |  | $ 35,620.4
Investments in unconsolidated affiliates | 2,583.4 |  | 2,659.4
Intangible assets, net | 3,736.4 |  | 3,690.3
Goodwill | 5,745.2 |  | 5,745.2
Segment assets | 48,481.3 |  | 47,715.3
NGL Pipelines & Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Total revenues | 3,413.3 | 3,345.8 |
Equity in income (loss) of unconsolidated affiliates | 19.4 | 15.5 |
Intangible assets, net | 404.4 |  | 322.3
Crude Oil Pipelines & Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Total revenues | 3,570.9 | 1,807.2 |
Equity in income (loss) of unconsolidated affiliates | 97.9 | 81.2 |
Intangible assets, net | 2,162.5 |  | 2,186.5
Natural Gas Pipelines & Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Total revenues | 804.8 | 761.2 |
Equity in income (loss) of unconsolidated affiliates | 1.0 | 1.0 |
Intangible assets, net | 1,008.7 |  | 1,018.4
Petrochemical & Refined Products Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Total revenues | 1,509.5 | 1,406.2 |
Equity in income (loss) of unconsolidated affiliates | (2.6) | (2.9) |
Intangible assets, net | 160.8 |  | 163.1
Reportable Business Segments [Member] | NGL Pipelines & Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Segment gross operating margin | 884.9 | 856.0 |
Revenues from third parties | 3,409.6 | 3,343.0 |
Revenues from related parties | 3.7 | 2.8 |
Intersegment and intrasegment revenues | 6,564.9 | 8,874.8 |
Total revenues | 9,978.2 | 12,220.6 |
Equity in income (loss) of unconsolidated affiliates | 19.4 | 15.5 |
Property, plant and equipment, net | 14,141.6 |  | 13,831.2
Investments in unconsolidated affiliates | 618.1 |  | 733.9
Intangible assets, net | 404.4 |  | 322.3
Goodwill | 2,651.7 |  | 2,651.7
Segment assets | 17,815.8 |  | 17,539.1
Reportable Business Segments [Member] | Crude Oil Pipelines & Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Segment gross operating margin | 220.0 | 264.6 |
Revenues from third parties | 3,552.7 | 1,802.6 |
Revenues from related parties | 18.2 | 4.6 |
Intersegment and intrasegment revenues | 11,426.3 | 3,474.0 |
Total revenues | 14,997.2 | 5,281.2 |
Equity in income (loss) of unconsolidated affiliates | 97.9 | 81.2 |
Property, plant and equipment, net | 5,255.5 |  | 5,208.4
Investments in unconsolidated affiliates | 1,872.5 |  | 1,839.2
Intangible assets, net | 2,162.5 |  | 2,186.5
Goodwill | 1,841.0 |  | 1,841.0
Segment assets | 11,131.5 |  | 11,075.1
Reportable Business Segments [Member] | Natural Gas Pipelines & Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Segment gross operating margin | 197.9 | 170.9 |
Revenues from third parties | 802.0 | 757.8 |
Revenues from related parties | 2.8 | 3.4 |
Intersegment and intrasegment revenues | 170.9 | 194.5 |
Total revenues | 975.7 | 955.7 |
Equity in income (loss) of unconsolidated affiliates | 1.0 | 1.0 |
Property, plant and equipment, net | 8,297.8 |  | 8,375.0
Investments in unconsolidated affiliates | 20.6 |  | 20.8
Intangible assets, net | 1,008.7 |  | 1,018.4
Goodwill | 296.3 |  | 296.3
Segment assets | 9,623.4 |  | 9,710.5
Reportable Business Segments [Member] | Petrochemical & Refined Products Services [Member] |  |  |
Information by business segment [Abstract] |  |  |
Segment gross operating margin | 271.9 | 181.8 |
Revenues from third parties | 1,509.5 | 1,406.2 |
Revenues from related parties | 0.0 | 0.0 |
Intersegment and intrasegment revenues | 613.3 | 414.7 |
Total revenues | 2,122.8 | 1,820.9 |
Equity in income (loss) of unconsolidated affiliates | (2.6) | (2.9) |
Property, plant and equipment, net | 3,518.3 |  | 3,507.7
Investments in unconsolidated affiliates | 72.2 |  | 65.5
Intangible assets, net | 160.8 |  | 163.1
Goodwill | 956.2 |  | 956.2
Segment assets | 4,707.5 |  | 4,692.5
Eliminations [Member] |  |  |
Information by business segment [Abstract] |  |  |
Revenues from third parties | 0.0 | 0.0 |
Revenues from related parties | 0.0 | 0.0 |
Intersegment and intrasegment revenues | (18,775.4) | (12,958.0) |
Total revenues | (18,775.4) | (12,958.0) |
Equity in income (loss) of unconsolidated affiliates | 0.0 | $ 0.0 |
Adjustments [Member] |  |  |
Information by business segment [Abstract] |  |  |
Property, plant and equipment, net | 5,203.1 |  | 4,698.1
Investments in unconsolidated affiliates | 0.0 |  | 0.0
Intangible assets, net | 0.0 |  | 0.0
Goodwill | 0.0 |  | 0.0
Segment assets | $ 5,203.1 |  | $ 4,698.1

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