Acquisition (Textuals) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 08, 2014	Mar. 31, 2014	Mar. 07, 2014
Business Acquisition [Line Items]
Exchange Ratio			1
Business Acquisition, Transaction Costs			$ 50.3
Business Acquisition, Percentage of Voting Interests Acquired			50.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest		7.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest		70.00%
Enlink Midstream, Inc.
Business Acquisition [Line Items]
Held by public shareholders [Member]			48,000,000
Restricted Units			400,000
Total subject to exchange			48,400,000
EMI common share price			$ 37.6
Business Acquisition, Date of Acquisition Agreement	Mar. 07, 2014
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest		100.00%
Business Combination, Consideration Transferred		1,822.6
EnLink Midstream Partners, LP
Business Acquisition [Line Items]
Restricted Units			400,000
Total subject to exchange			92,600,000
Common units held by public unitholders			75,100,000
Preferred units held by third party			17,100,000
Partnership common unit price			$ 30.51
Partnership common units value			2,825.2
Partnership outstanding unit options value			3.9
Total fair value of non-controlling interests		2,828.8
Business Combination, Consideration Transferred		$ 4,651.4
Gulf Coast Fractionators
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage		38.75%	38.75%