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Intangible Assets and Goodwill, Intangible Assets (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | $ 2,611.2 |  | $ 2,611.2 |  | $ 2,616.8
Accumulated Amortization | (1,098.0) |  | (1,098.0) |  | (1,050.0)
Carrying Value | 1,513.2 |  | 1,513.2 |  | 1,566.8
Amortization Expense | 26.7 | 31.3 | 53.6 | 63.6 |
Forecasted amortization expense [Abstract] |  |  |  |  |
Remainder of 2013 | 51.7 |  | 51.7 |  |
2014 | 96.2 |  | 96.2 |  |
2015 | 90.3 |  | 90.3 |  |
2016 | 92.0 |  | 92.0 |  |
2017 | 96.0 |  | 96.0 |  |
NGL Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 621.1 |  | 621.1 |  | 625.4
Accumulated Amortization | (319.6) |  | (319.6) |  | (304.8)
Carrying Value | 301.5 |  | 301.5 |  | 320.6
Amortization Expense | 9.5 | 9.6 | 19.1 | 19.8 |
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 340.8 |  | 340.8 |  | 340.8
Accumulated Amortization | (156.8) |  | (156.8) |  | (147.6)
Carrying Value | 184.0 |  | 184.0 |  | 193.2
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 280.3 |  | 280.3 |  | 284.6
Accumulated Amortization | (162.8) |  | (162.8) |  | (157.2)
Carrying Value | 117.5 |  | 117.5 |  | 127.4
Onshore Natural Gas Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 1,629.7 |  | 1,629.7 |  | 1,629.7
Accumulated Amortization | (586.5) |  | (586.5) |  | (561.8)
Carrying Value | 1,043.2 |  | 1,043.2 |  | 1,067.9
Amortization Expense | 12.3 | 15.8 | 24.7 | 31.6 |
Onshore Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 1,163.6 |  | 1,163.6 |  | 1,163.6
Accumulated Amortization | (265.3) |  | (265.3) |  | (250.0)
Carrying Value | 898.3 |  | 898.3 |  | 913.6
Onshore Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 466.1 |  | 466.1 |  | 466.1
Accumulated Amortization | (321.2) |  | (321.2) |  | (311.8)
Carrying Value | 144.9 |  | 144.9 |  | 154.3
Onshore Crude Oil Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 11.1 |  | 11.1 |  | 11.1
Accumulated Amortization | (5.9) |  | (5.9) |  | (5.2)
Carrying Value | 5.2 |  | 5.2 |  | 5.9
Amortization Expense | 0.4 | 0.1 | 0.7 | 0.3 |
Onshore Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 10.7 |  | 10.7 |  | 10.7
Accumulated Amortization | (5.6) |  | (5.6) |  | (4.9)
Carrying Value | 5.1 |  | 5.1 |  | 5.8
Onshore Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 0.4 |  | 0.4 |  | 0.4
Accumulated Amortization | (0.3) |  | (0.3) |  | (0.3)
Carrying Value | 0.1 |  | 0.1 |  | 0.1
Offshore Pipelines & Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 205.1 |  | 205.1 |  | 205.1
Accumulated Amortization | (144.9) |  | (144.9) |  | (138.9)
Carrying Value | 60.2 |  | 60.2 |  | 66.2
Amortization Expense | 2.9 | 2.6 | 5.9 | 5.2 |
Offshore Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 203.9 |  | 203.9 |  | 203.9
Accumulated Amortization | (144.5) |  | (144.5) |  | (138.5)
Carrying Value | 59.4 |  | 59.4 |  | 65.4
Offshore Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 1.2 |  | 1.2 |  | 1.2
Accumulated Amortization | (0.4) |  | (0.4) |  | (0.4)
Carrying Value | 0.8 |  | 0.8 |  | 0.8
Petrochemical & Refined Products Services [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 144.2 |  | 144.2 |  | 145.5
Accumulated Amortization | (41.1) |  | (41.1) |  | (39.3)
Carrying Value | 103.1 |  | 103.1 |  | 106.2
Amortization Expense | 1.6 | 3.2 | 3.2 | 6.7 |
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 104.3 |  | 104.3 |  | 104.3
Accumulated Amortization | (35.9) |  | (35.9) |  | (33.4)
Carrying Value | 68.4 |  | 68.4 |  | 70.9
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |
Gross Value | 39.9 |  | 39.9 |  | 41.2
Accumulated Amortization | (5.2) |  | (5.2) |  | (5.9)
Carrying Value | $ 34.7 |  | $ 34.7 |  | $ 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 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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