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Business Combinations (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended | 14 Months Ended
--- | --- | --- | --- | ---
Feb. 28, 2015 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 13, 2015
Description of Business Combinations: |  |  |  |  |  |  |
Cash paid to acquire business |  |  | $ 198.7 | $ 1,000.0 | $ 1,056.5 |  |
Common units issued in connection with acquisition |  |  |  |  | 36,827,517 | 54,807,352 |
Intangible assets reclassified to goodwill |  |  |  |  | $ 1,454.1 |  |
EFS Midstream Contract with Producers [Member] |  |  |  |  |  |  |
Description of Business Combinations: |  |  |  |  |  |  |
Contractual obligation |  |  | $ 270.0 |  |  |  |
Azure Midstream Partners, L.P. [Member] |  |  |  |  |  |  |
Description of Business Combinations: |  |  |  |  |  |  |
Business acquisition, description |  |  | The acquired business assets, which are located primarily in East Texas, include over 750 miles of natural gas gathering pipelines and two natural gas processing facilities (Panola and Fairway) with an aggregate processing capacity of 130 MMcf/d. The acquired business primarily serves production from the Haynesville Shale and Bossier, Cotton Valley and Travis Peak formations. |  |  |  |
Total consideration for acquisition |  |  | $ 191.4 |  |  |  |
Eagle Ford Midstream Assets [Member] |  |  |  |  |  |  |
Description of Business Combinations: |  |  |  |  |  |  |
Business acquisition, description |  |  | The EFS Midstream System provides condensate gathering and processing services as well as gathering, treating and compression services for the associated natural gas. |  |  |  |
Total consideration for acquisition |  |  |  |  | 2,100.0 |  |
Cash paid to acquire business |  |  |  | $ 1,000.0 | 1,100.0 |  |
Revenues from acquired assets |  | $ 117.8 |  |  |  |  |
Net income from acquired assets |  | $ 59.9 |  |  |  |  |
Oiltanking Partners L.P. [Member] |  |  |  |  |  |  |
Description of Business Combinations: |  |  |  |  |  |  |
Business acquisition, description |  |  | Oiltanking owned marine terminals located on the Houston Ship Channel and at the Port of Beaumont featuring a number of ship and barge docks and extensive crude oil and petroleum products storage capacity. |  |  |  |
Total consideration for acquisition |  |  |  |  |  | $ 4,400.0 | $ 6,020.0
Noncontrolling interests acquired |  |  |  |  | 1,400.0 |  |
Intangible assets reclassified to goodwill |  |  |  |  | 1,450.0 |  |
Oiltanking Partners L.P. - Step 1 [Member] |  |  |  |  |  |  |
Description of Business Combinations: |  |  |  |  |  |  |
Common units acquired (in units) |  |  |  |  |  | 15,899,802 |
Subordinated units acquired (in units) |  |  |  |  |  | 38,899,802 |
Cash paid to acquire business |  |  |  |  |  | $ 2,210.0 |
Common units issued in connection with acquisition |  |  |  |  |  | 54,807,352 |
Cash paid to assume notes receivable |  |  |  |  |  | $ 228.3 |
Oiltanking Partners L.P. - Step 2 [Member] |  |  |  |  |  |  |
Description of Business Combinations: |  |  |  |  |  |  |
Common units issued in connection with acquisition | 36,827,517 |  |  |  |  |  |
Common units exchanged for each Oiltanking unit (in units) | 1.3 |  |  |  |  |  |
Noncontrolling interests acquired |  |  |  |  | $ 1,400.0 |  |
Intangible assets reclassified to goodwill | $ 1,460.0 |  |  |  |  |  |

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- Definition With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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