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Business Segments, Segment Reporting Information (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | $ 12,085.6 |  | $ 10,461.2 | $ 34,605.4 |  | $ 31,447.1 |  |
Revenues from related parties | 7.7 |  | 7.5 | 20.3 |  | 63.9 |  |
Revenues | 12,093.3 |  | 10,468.7 | 34,625.7 |  | 31,511.0 |  |
Equity in income (loss) of unconsolidated affiliates | 44.0 |  | 21.0 | 126.1 |  | 42.2 |  |
Gross operating margin | 1,154.0 |  | 1,139.6 | 3,527.3 |  | 3,225.3 |  |
Property, plant and equipment, net (see Note 6) | 26,453.9 |  |  | 26,453.9 |  |  | 24,846.4 |
Investments in unconsolidated affiliates (see Note 7) | 2,134.5 |  |  | 2,134.5 |  |  | 1,394.6 |
Intangible assets, net: (see Note 8) | 1,487.6 |  |  | 1,487.6 |  |  | 1,566.8 |
Goodwill: (see Note 8) | 2,080.0 | [1] |  | 2,080.0 | [1] |  | 2,086.8 | [1]
Segment assets | 32,156.0 |  |  | 32,156.0 |  |  | 29,894.6 |
NGL Pipelines and Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 4,230.6 |  | 3,389.6 | 11,686.0 |  | 11,071.6 |  |
Revenues from related parties | 0.1 |  | 2.2 | 0.6 |  | 7.2 |  |
Revenues | 4,230.7 |  | 3,391.8 | 11,686.6 |  | 11,078.8 |  |
Equity in income (loss) of unconsolidated affiliates | 4.1 |  | 3.0 | 11.8 |  | 12.0 |  |
Gross operating margin | 639.6 |  | 615.8 | 1,777.0 |  | 1,836.5 |  |
Property, plant and equipment, net (see Note 6) | 9,529.0 |  |  | 9,529.0 |  |  | 8,494.8 |
Investments in unconsolidated affiliates (see Note 7) | 607.2 |  |  | 607.2 |  |  | 324.6 |
Intangible assets, net: (see Note 8) | 293.9 |  |  | 293.9 |  |  | 320.6 |
Goodwill: (see Note 8) | 341.2 | [1] |  | 341.2 | [1] |  | 341.2 | [1]
Segment assets | 10,771.3 |  |  | 10,771.3 |  |  | 9,481.2 |
Onshore Natural Gas Pipelines And Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 831.4 |  | 843.3 | 2,658.6 |  | 2,349.1 |  |
Revenues from related parties | 4.1 |  | 3.2 | 12.1 |  | 51.4 |  |
Revenues | 835.5 |  | 846.5 | 2,670.7 |  | 2,400.5 |  |
Equity in income (loss) of unconsolidated affiliates | 1.0 |  | 0.9 | 2.9 |  | 3.5 |  |
Gross operating margin | 213.4 |  | 183.5 | 601.9 |  | 565.5 |  |
Property, plant and equipment, net (see Note 6) | 8,892.5 |  |  | 8,892.5 |  |  | 8,950.1 |
Investments in unconsolidated affiliates (see Note 7) | 24.3 |  |  | 24.3 |  |  | 24.9 |
Intangible assets, net: (see Note 8) | 1,029.9 |  |  | 1,029.9 |  |  | 1,067.9 |
Goodwill: (see Note 8) | 296.3 | [1] |  | 296.3 | [1] |  | 296.3 | [1]
Segment assets | 10,243.0 |  |  | 10,243.0 |  |  | 10,339.2 |
Onshore Crude Oil Pipelines and Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 5,435.4 |  | 4,505.1 | 15,358.1 |  | 13,167.4 |  |
Revenues from related parties | 2.1 |  | 0.1 | 2.1 |  | 0.1 |  |
Revenues | 5,437.5 |  | 4,505.2 | 15,360.2 |  | 13,167.5 |  |
Equity in income (loss) of unconsolidated affiliates | 34.3 |  | 16.5 | 101.0 |  | 20.6 |  |
Gross operating margin | 146.0 |  | 117.6 | 579.6 |  | 252.7 |  |
Property, plant and equipment, net (see Note 6) | 1,455.0 |  |  | 1,455.0 |  |  | 1,385.9 |
Investments in unconsolidated affiliates (see Note 7) | 889.6 |  |  | 889.6 |  |  | 493.8 |
Intangible assets, net: (see Note 8) | 4.9 |  |  | 4.9 |  |  | 5.9 |
Goodwill: (see Note 8) | 305.1 | [1] |  | 305.1 | [1] |  | 311.2 | [1]
Segment assets | 2,654.6 |  |  | 2,654.6 |  |  | 2,196.8 |
Offshore Pipelines And Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 38.2 |  | 43.2 | 118.0 |  | 145.1 |  |
Revenues from related parties | 1.4 |  | 2.0 | 5.5 |  | 5.2 |  |
Revenues | 39.6 |  | 45.2 | 123.5 |  | 150.3 |  |
Equity in income (loss) of unconsolidated affiliates | 9.8 |  | 6.8 | 24.9 |  | 17.8 |  |
Gross operating margin | 37.9 |  | 40.6 | 118.1 |  | 131.0 |  |
Property, plant and equipment, net (see Note 6) | 1,244.5 |  |  | 1,244.5 |  |  | 1,343.0 |
Investments in unconsolidated affiliates (see Note 7) | 540.4 |  |  | 540.4 |  |  | 479.0 |
Intangible assets, net: (see Note 8) | 57.4 |  |  | 57.4 |  |  | 66.2 |
Goodwill: (see Note 8) | 82.1 | [1] |  | 82.1 | [1] |  | 82.1 | [1]
Segment assets | 1,924.4 |  |  | 1,924.4 |  |  | 1,970.3 |
Petrochemical and Refined Products Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 1,550.0 |  | 1,680.0 | 4,784.7 |  | 4,713.9 |  |
Revenues from related parties | 0 |  | 0 | 0 |  | 0 |  |
Revenues | 1,550.0 |  | 1,680.0 | 4,784.7 |  | 4,713.9 |  |
Equity in income (loss) of unconsolidated affiliates | (5.2) |  | (6.2) | (14.5) |  | (14.1) |  |
Gross operating margin | 117.1 |  | 182.1 | 450.7 |  | 437.2 |  |
Property, plant and equipment, net (see Note 6) | 2,627.1 |  |  | 2,627.1 |  |  | 2,559.5 |
Investments in unconsolidated affiliates (see Note 7) | 73.0 |  |  | 73.0 |  |  | 72.3 |
Intangible assets, net: (see Note 8) | 101.5 |  |  | 101.5 |  |  | 106.2 |
Goodwill: (see Note 8) | 1,055.3 | [1] |  | 1,055.3 | [1] |  | 1,056.0 | [1]
Segment assets | 3,856.9 |  |  | 3,856.9 |  |  | 3,794.0 |
Other Investment [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 0 |  | 0 | 0 |  | 0 |  |
Revenues from related parties | 0 |  | 0 | 0 |  | 0 |  |
Equity in income (loss) of unconsolidated affiliates | 0 |  | 0 | 0 |  | 2.4 |  |
Gross operating margin | 0 |  | 0 | 0 |  | 2.4 |  |
Property, plant and equipment, net (see Note 6) | 0 |  |  | 0 |  |  | 0 |
Investments in unconsolidated affiliates (see Note 7) | 0 |  |  | 0 |  |  | 0 |
Intangible assets, net: (see Note 8) | 0 |  |  | 0 |  |  | 0 |
Goodwill: (see Note 8) | 0 |  |  | 0 |  |  | 0 |
Segment assets | 0 |  |  | 0 |  |  | 0 |
Adjustments and Eliminations [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues from third parties | 0 |  | 0 | 0 |  | 0 |  |
Revenues from related parties | 0 |  | 0 | 0 |  | 0 |  |
Equity in income (loss) of unconsolidated affiliates | 0 |  | 0 | 0 |  | 0 |  |
Gross operating margin | 0 |  | 0 | 0 |  | 0 |  |
Property, plant and equipment, net (see Note 6) | 2,705.8 |  |  | 2,705.8 |  |  | 2,113.1 |
Investments in unconsolidated affiliates (see Note 7) | 0 |  |  | 0 |  |  | 0 |
Intangible assets, net: (see Note 8) | 0 |  |  | 0 |  |  | 0 |
Goodwill: (see Note 8) | 0 |  |  | 0 |  |  | 0 |
Segment assets | 2,705.8 |  |  | 2,705.8 |  |  | 2,113.1 |
Operating Segments [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 12,093.3 |  | 10,468.7 | 34,625.7 |  | 31,511.0 |  |
Operating Segments [Member] | NGL Pipelines and Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 6,773.0 |  | 5,693.4 | 19,318.3 |  | 18,475.1 |  |
Operating Segments [Member] | Onshore Natural Gas Pipelines And Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 1,051.1 |  | 1,057.9 | 3,397.4 |  | 3,014.6 |  |
Operating Segments [Member] | Onshore Crude Oil Pipelines and Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 9,028.8 |  | 6,014.4 | 23,693.2 |  | 18,143.1 |  |
Operating Segments [Member] | Offshore Pipelines And Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 41.4 |  | 45.2 | 131.5 |  | 155.3 |  |
Operating Segments [Member] | Petrochemical and Refined Products Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 1,934.4 |  | 2,158.8 | 5,985.4 |  | 6,071.3 |  |
Operating Segments [Member] | Other Investment [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 0 |  | 0 | 0 |  | 0 |  |
Operating Segments [Member] | Adjustments and Eliminations [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | (6,735.4) |  | (4,501.0) | (17,900.1) |  | (14,348.4) |  |
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 0 |  | 0 | 0 |  | 0 |  |
Intersegment Eliminations [Member] | NGL Pipelines and Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | (2,542.3) |  | (2,301.6) | (7,631.7) |  | (7,396.3) |  |
Intersegment Eliminations [Member] | Onshore Natural Gas Pipelines And Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | (215.6) |  | (211.4) | (726.7) |  | (614.1) |  |
Intersegment Eliminations [Member] | Onshore Crude Oil Pipelines and Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | (3,591.3) |  | (1,509.2) | (8,333.0) |  | (4,975.6) |  |
Intersegment Eliminations [Member] | Offshore Pipelines And Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | (1.8) |  | 0 | (8.0) |  | (5.0) |  |
Intersegment Eliminations [Member] | Petrochemical and Refined Products Services [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | (384.4) |  | (478.8) | (1,200.7) |  | (1,357.4) |  |
Intersegment Eliminations [Member] | Other Investment [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | 0 |  | 0 | 0 |  | 0 |  |
Intersegment Eliminations [Member] | Adjustments and Eliminations [Member] |  |  |  |  |  |  |  |
Information by business segment [Abstract] |  |  |  |  |  |  |  |
Revenues | $ (6,735.4) |  | $ (4,501.0) | $ (17,900.1) |  | $ (14,348.4) |  |
[1] | The total carrying amount of goodwill at September 30, 2013 and December 31, 2012 is net of $1.3 million of accumulated impairment charges. No goodwill impairment charges were recorded during the nine months ended September 30, 2013.

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