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Intangible Assets and Goodwill, Goodwill (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
Changes in carrying amount of goodwill [Roll Forward] |  |
Balance at beginning of period | $ 4,300.2 |
Purchase price and other adjustments | 1,454.1 |
Reduction in goodwill related to the sale of assets | (82.0) |
Addition to goodwill related to the acquisition of EFS Midstream | 82.3 |
Goodwill reclassified to assets held-for-sale | (5.4) |
Balance at end of period | 5,749.2 | $ 4,300.2
Oiltanking Partners L.P. - Step 1 [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Purchase price and other adjustments |  | 100.3
NGL Pipelines & Services [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Balance at beginning of period | 2,210.2 |
Purchase price and other adjustments | 432.6 |
Reduction in goodwill related to the sale of assets | 0.0 |
Addition to goodwill related to the acquisition of EFS Midstream | 8.9 |
Goodwill reclassified to assets held-for-sale | 0.0 |
Balance at end of period | 2,651.7 | 2,210.2
NGL Pipelines & Services [Member] | Oiltanking Partners L.P. - Step 1 [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Purchase price and other adjustments |  | 29.8
Crude Oil Pipelines & Services [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Balance at beginning of period | 918.7 |
Purchase price and other adjustments | 850.7 |
Reduction in goodwill related to the sale of assets | 0.0 |
Addition to goodwill related to the acquisition of EFS Midstream | 73.4 |
Goodwill reclassified to assets held-for-sale | 0.0 |
Balance at end of period | 1,842.8 | 918.7
Crude Oil Pipelines & Services [Member] | Oiltanking Partners L.P. - Step 1 [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Purchase price and other adjustments |  | 58.8
Natural Gas Pipelines & Services [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Balance at beginning of period | 296.3 |
Purchase price and other adjustments | 0.0 |
Reduction in goodwill related to the sale of assets | 0.0 |
Addition to goodwill related to the acquisition of EFS Midstream | 0.0 |
Goodwill reclassified to assets held-for-sale | 0.0 |
Balance at end of period | 296.3 | 296.3
Petrochemical & Refined Products Services [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Balance at beginning of period | 793.0 |
Purchase price and other adjustments | 170.8 |
Reduction in goodwill related to the sale of assets | 0.0 |
Addition to goodwill related to the acquisition of EFS Midstream | 0.0 |
Goodwill reclassified to assets held-for-sale | (5.4) |
Balance at end of period | 958.4 | 793.0
Petrochemical & Refined Products Services [Member] | Oiltanking Partners L.P. - Step 1 [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Purchase price and other adjustments |  | 11.7
Offshore Pipelines & Services [Member] |  |
Changes in carrying amount of goodwill [Roll Forward] |  |
Balance at beginning of period | 82.0 |
Purchase price and other adjustments | 0.0 |
Reduction in goodwill related to the sale of assets | (82.0) |
Addition to goodwill related to the acquisition of EFS Midstream | 0.0 |
Goodwill reclassified to assets held-for-sale | 0.0 |
Balance at end of period | $ 0.0 | $ 82.0

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