Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Millions					1 Months Ended		3 Months Ended												12 Months Ended
		Nov. 09, 2016	Oct. 29, 2015	Jan. 01, 2014	Jan. 31, 2016	Jun. 30, 2014	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Accounts payable to related party							$ 16.3				$ 10.4								$ 16.3	$ 10.4
Revenues							1,756.2	$ 1,397.9	$ 1,263.6	$ 1,321.9	1,224.9	$ 1,104.6	$ 1,033.2	$ 889.7	$ 1,066.5	$ 1,170.6	$ 1,274.5	$ 940.5	5,739.6	4,252.4	$ 4,452.1
Cost of sales	[1]																		4,361.5	3,015.5	3,245.3
Proceeds from issuance of ENLK common units																			106.9	167.5	24.4
Cedar Cove Joint Venture
Related Party Transaction [Line Items]
Term of contract		15 years
Revenues																			5.4
Cost of sales	[1]																		30.6
Reimbursed Capital Expenditures [Member]
Related Party Transaction [Line Items]
Related party transactions																			48.4	31.5
Tax Sharing Agreement
Related Party Transaction [Line Items]
Related party transactions																			1.2	2.3	3.0
Net Devon Investment
Related Party Transaction [Line Items]
Accounts receivable balance							102.7				100.2								102.7	100.2
Accounts payable to related party							$ 16.3				$ 10.4								16.3	10.4
Revenue from related parties																			78.0	107.2	107.5
Net Devon Investment | EnLink Midstream Partners, LP
Related Party Transaction [Line Items]
Revenues																			615.5	611.8	596.3
Revenue from related parties																			81.9	46.2	24.4
Net Devon Investment | VEX Pipeline
Related Party Transaction [Line Items]
Term of contract						5 years
Revenue from related parties																			17.8	18.7	17.8
Net Devon Investment | Enlink Midstream Services Agreement | EnLink Midstream Partners, LP
Related Party Transaction [Line Items]
Term of contract				10 years
Acacia
Related Party Transaction [Line Items]
Revenue from related parties																			13.8	15.2	16.4
Gulf Coast Fractionators
Related Party Transaction [Line Items]
Revenue from related parties																			$ 12.6	3.4	13.0
Gulf Coast Fractionators | Net Devon Investment
Related Party Transaction [Line Items]
Ownership interest							38.75%												38.75%
Devon Energy Production Company | EnLink Oklahoma T.O.
Related Party Transaction [Line Items]
Term of contract					15 years
Minimum volume commitment					4 years
Revenue from related parties																			$ 100.4	34.4
Devon Energy Production Company | VEX Pipeline
Related Party Transaction [Line Items]
Minimum volume commitment						5 years
E N L K
Related Party Transaction [Line Items]
Reimbursement revenue																			$ 2.4	$ 2.3	$ 2.1
Partners' capital account, units, sold in private placement (in shares)			2,849,100.0000
Shares issued, price per share (in dollars per share)			$ 17.55
Proceeds from issuance of ENLK common units			$ 50.0
Customer Concentration Risk | Sales Revenue, Net | Net Devon Investment
Related Party Transaction [Line Items]
Concentration risk																			14.40%	18.50%	16.60%

[1] Includes related party cost of sales of $211.0 million, $150.1 million and $141.3 million for the years ended December 31, 2017, 2016 and 2015, respectively.