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.

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=65885119&loc=d3e1392-128463

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Period Type:

Property, Plant and Equipment, Other (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Cash used for pending business combination		$ 16.0	$ 0.0
Azure Midstream Partners, L.P. [Member]
Business Acquisition [Line Items]
Business combination, description		Azure’s assets, which are located in East Texas and North Louisiana, include over 960 miles of natural gas gathering pipelines, three natural gas processing facilities with an aggregate processing capacity of approximately 210 million cubic feet per day, and two NGL pipelines with throughput capacities of 10 thousand barrels per day each. The Azure assets serve production from the Haynesville Shale and Bossier, Cotton Valley and Travis Peak formations.
Cash used for pending business combination		$ 16.0
Total consideration for acquisition	$ 189.0