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Intangible Assets and Goodwill, Intangible Assets (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | $ 5,274.3 |  | $ 5,274.3 |  | $ 5,548.4
Accumulated Amortization |  | (1,192.2) |  | (1,192.2) |  | (1,246.3)
Carrying Value |  | 4,082.1 |  | 4,082.1 |  | 4,302.1
Amortization Expense |  | 51.7 | $ 23.5 | 129.2 | $ 72.7 |
Forecasted amortization expense [Abstract] |  |  |  |  |  |
Remainder of 2015 |  | 50.3 |  | 50.3 |  |
2016 |  | 218.8 |  | 218.8 |  |
2017 |  | 223.5 |  | 223.5 |  |
2018 |  | 220.4 |  | 220.4 |  |
2019 |  | 208.6 |  | 208.6 |  |
Oiltanking Partners L.P. - Step 1 [Member] | Incentive distribution rights [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  |  |  |  |  | 1,460.0
Carrying Value |  |  |  |  |  | 1,460.0
Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 1,410.0 |  | $ 1,410.0 |  |
Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] | Minimum [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 26 years |  |
Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] | Maximum [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  | 29 years |  |
NGL Pipelines & Services [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 833.8 |  | $ 833.8 |  | 1,051.1
Accumulated Amortization |  | (373.4) |  | (373.4) |  | (361.9)
Carrying Value |  | 460.4 |  | 460.4 |  | 689.2
Amortization Expense |  | 9.7 | 8.1 | 24.9 | 25.4 |
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 550.8 |  | 550.8 |  | 340.8
Accumulated Amortization |  | (183.8) |  | (183.8) |  | (183.2)
Carrying Value |  | 367.0 |  | 367.0 |  | 157.6
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 283.0 |  | 283.0 |  | 277.7
Accumulated Amortization |  | (189.6) |  | (189.6) |  | (178.7)
Carrying Value |  | 93.4 |  | 93.4 |  | 99.0
NGL Pipelines & Services [Member] | Incentive distribution rights [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value | [1] | 0.0 |  | 0.0 |  | 432.6
Accumulated Amortization | [1] | 0.0 |  | 0.0 |  | 0.0
Carrying Value | [1] | 0.0 |  | 0.0 |  | 432.6
NGL Pipelines & Services [Member] | Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 230.1 |  | 230.1 |  |
Crude Oil Pipelines & Services [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 2,485.8 |  | 2,485.8 |  | 2,244.8
Accumulated Amortization |  | (83.5) |  | (83.5) |  | (21.2)
Carrying Value |  | 2,402.3 |  | 2,402.3 |  | 2,223.6
Amortization Expense |  | 29.0 | 0.3 | 62.3 | 0.9 |
Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 2,204.4 |  | 2,204.4 |  | 1,108.0
Accumulated Amortization |  | (28.1) |  | (28.1) |  | (7.7)
Carrying Value |  | 2,176.3 |  | 2,176.3 |  | 1,100.3
Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 281.4 |  | 281.4 |  | 281.4
Accumulated Amortization |  | (55.4) |  | (55.4) |  | (13.5)
Carrying Value |  | 226.0 |  | 226.0 |  | 267.9
Crude Oil Pipelines & Services [Member] | Incentive distribution rights [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value | [1] | 0.0 |  | 0.0 |  | 855.4
Accumulated Amortization | [1] | 0.0 |  | 0.0 |  | 0.0
Carrying Value | [1] | 0.0 |  | 0.0 |  | 855.4
Crude Oil Pipelines & Services [Member] | Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 1,100.0 |  | 1,100.0 |  |
Natural Gas Pipelines & Services [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 1,712.9 |  | 1,712.9 |  | 1,629.6
Accumulated Amortization |  | (687.2) |  | (687.2) |  | (656.7)
Carrying Value |  | 1,025.7 |  | 1,025.7 |  | 972.9
Amortization Expense |  | 10.7 | 11.1 | 30.5 | 34.2 |
Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 1,246.9 |  | 1,246.9 |  | 1,163.6
Accumulated Amortization |  | (327.8) |  | (327.8) |  | (308.9)
Carrying Value |  | 919.1 |  | 919.1 |  | 854.7
Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 466.0 |  | 466.0 |  | 466.0
Accumulated Amortization |  | (359.4) |  | (359.4) |  | (347.8)
Carrying Value |  | 106.6 |  | 106.6 |  | 118.2
Natural Gas Pipelines & Services [Member] | Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 83.3 |  | 83.3 |  |
Petrochemical & Refined Products Services [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 241.8 |  | 241.8 |  | 425.9
Accumulated Amortization |  | (48.1) |  | (48.1) |  | (51.1)
Carrying Value |  | 193.7 |  | 193.7 |  | 374.8
Amortization Expense |  | 2.3 | 1.5 | 7.0 | 4.6 |
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 185.5 |  | 185.5 |  | 198.4
Accumulated Amortization |  | (37.3) |  | (37.3) |  | (43.3)
Carrying Value |  | 148.2 |  | 148.2 |  | 155.1
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value |  | 56.3 |  | 56.3 |  | 56.3
Accumulated Amortization |  | (10.8) |  | (10.8) |  | (7.8)
Carrying Value |  | 45.5 |  | 45.5 |  | 48.5
Petrochemical & Refined Products Services [Member] | Incentive distribution rights [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value | [1] | 0.0 |  | 0.0 |  | 171.2
Accumulated Amortization | [1] | 0.0 |  | 0.0 |  | 0.0
Carrying Value | [1] | 0.0 |  | 0.0 |  | 171.2
Offshore Pipelines & Services [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value | [2] | 0.0 |  | 0.0 |  | 197.0
Accumulated Amortization | [2] | 0.0 |  | 0.0 |  | (155.4)
Carrying Value | [2] | 0.0 |  | 0.0 |  | 41.6
Amortization Expense |  | 0.0 | $ 2.5 | 4.5 | $ 7.6 |
Offshore Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value | [2] | 0.0 |  | 0.0 |  | 195.8
Accumulated Amortization | [2] | 0.0 |  | 0.0 |  | (154.9)
Carrying Value | [2] | 0.0 |  | 0.0 |  | 40.9
Offshore Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |  |  |  |
Identifiable intangible assets [Abstract] |  |  |  |  |  |
Gross Value | [2] | 0.0 |  | 0.0 |  | 1.2
Accumulated Amortization | [2] | 0.0 |  | 0.0 |  | (0.5)
Carrying Value | [2] | $ 0.0 |  | $ 0.0 |  | $ 0.7
[1] | At December 31, 2014, we had indefinite-lived intangible assets outstanding with a carrying value of $1.46 billion recorded in connection with our acquisition of the Oiltanking IDRs in October 2014. The IDRs represented contractual rights to future cash incentive distributions to be paid by Oiltanking. In February 2015 (following completion of Step 2 of the Oiltanking acquisition), the Oiltanking IDRs were cancelled and the carrying value of the IDRs were reclassified to goodwill.
[2] | Our intangible assets classified within the Offshore Pipelines & Services segment were sold to Genesis in July 2015 (see Note 6).

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