Certain Provisions of the Partnership agreement (Partners' Capital) (Allocated Net Income (loss) to the General Partner) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Income allocation for incentive distributions	$ 1.4
Stock-based compensation attributable to ENLC's restricted units	(0.6)
General Partner interest in net income	0.1
General Partner share of net income	$ 0.9
Incentive Distribution Percentage | 48% | General Partner Interest
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Percentage Levels	48.00%
Incentive Distribution Percentage | 23% | General Partner Interest
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Percentage Levels	23.00%
Incentive Distribution Percentage | 13% | General Partner Interest
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Percentage Levels	13.00%
Incentive Distribution Distribution Per Unit | 48% | General Partner Interest
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distibution Excess Per Unit Amount	$ 0.375
Incentive Distribution Distribution Per Unit | 23% | General Partner Interest
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distibution Excess Per Unit Amount	$ 0.3125
Incentive Distribution Distribution Per Unit | 13% | General Partner Interest
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distibution Excess Per Unit Amount	$ 0.25