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Intangible Assets and Goodwill, Intangible Assets (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 2,612.2 | $ 2,616.8 |
Accumulated Amortization | (1,150.0) | (1,050.0) |
Carrying Value | 1,462.2 | 1,566.8 | 1,656.2
Amortization Expense | 105.6 | 125.7 | 147.0
Forecasted amortization expense [Abstract] |  |  |
2014 | 93.8 |  |
2015 | 85.6 |  |
2016 | 81.2 |  |
2017 | 85.7 |  |
2018 | 89.0 |  |
Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Carrying Value | 1,180.0 |  |
Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Carrying Value | 280.3 |  |
NGL Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 622.1 | 625.4 |
Accumulated Amortization | (336.9) | (304.8) |
Carrying Value | 285.2 | 320.6 | 341.3
Amortization Expense | 36.4 | 39.7 | 41.1
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 340.8 | 340.8 |
Accumulated Amortization | (165.7) | (147.6) |
Carrying Value | 175.1 | 193.2 |
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 281.3 | 284.6 |
Accumulated Amortization | (171.2) | (157.2) |
Carrying Value | 110.1 | 127.4 |
Onshore Natural Gas Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,629.7 | 1,629.7 |
Accumulated Amortization | (611.9) | (561.8) |
Carrying Value | 1,017.8 | 1,067.9 | 1,127.8
Amortization Expense | 50.1 | 63.4 | 77.1
Onshore Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,163.6 | 1,163.6 |
Accumulated Amortization | (281.2) | (250.0) |
Carrying Value | 882.4 | 913.6 |
Onshore Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 466.1 | 466.1 |
Accumulated Amortization | (330.7) | (311.8) |
Carrying Value | 135.4 | 154.3 |
Onshore Crude Oil Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 11.1 | 11.1 |
Accumulated Amortization | (6.6) | (5.2) |
Carrying Value | 4.5 | 5.9 | 5.8
Amortization Expense | 1.4 | 0.9 | 0.4
Onshore Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 10.7 | 10.7 |
Accumulated Amortization | (6.3) | (4.9) |
Carrying Value | 4.4 | 5.8 |
Onshore Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 0.4 | 0.4 |
Accumulated Amortization | (0.3) | (0.3) |
Carrying Value | 0.1 | 0.1 |
Offshore Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 205.1 | 205.1 |
Accumulated Amortization | (150.4) | (138.9) |
Carrying Value | 54.7 | 66.2 | 77.5
Amortization Expense | 11.5 | 11.3 | 11.2
Offshore Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 203.9 | 203.9 |
Accumulated Amortization | (150.0) | (138.5) |
Carrying Value | 53.9 | 65.4 |
Offshore Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1.2 | 1.2 |
Accumulated Amortization | (0.4) | (0.4) |
Carrying Value | 0.8 | 0.8 |
Petrochemical & Refined Products Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 144.2 | 145.5 |
Accumulated Amortization | (44.2) | (39.3) |
Carrying Value | 100.0 | 106.2 | 103.8
Amortization Expense | 6.2 | 10.4 | 17.2
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 104.3 | 104.3 |
Accumulated Amortization | (38.2) | (33.4) |
Carrying Value | 66.1 | 70.9 |
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 39.9 | 41.2 |
Accumulated Amortization | (6.0) | (5.9) |
Carrying Value | $ 33.9 | $ 35.3 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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