Employee Incentive Plans (Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				12 Months Ended
	Oct. 31, 2016	Feb. 29, 2016	Jan. 31, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Apr. 07, 2016	Feb. 05, 2014
Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized							14,070,000
Restricted Stock Units (RSUs)
Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized								11,000,000
Number of Units
Non-vested, beginning of period (in units)			1,148,893		1,148,893
Granted (in units)					1,146,067
Vested (Units)					(340,234)
Forfeited (Units)					(57,428)
Non-vested, end of period (Units)					1,897,298	1,148,893
Aggregate intrinsic value, end of period (in millions)					$ 36.1
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per unit)			$ 34.78		$ 34.78
Granted (in dollars per unit)					10.16
Vested (in dollars per unit)					36.55
Forfeited (in dollars per unit)					22.67
Non-vested, end of period (in dollars per unit)					$ 19.96	$ 34.78
Units withheld for payroll taxes on behalf of employees					97,087
Aggregate intrinsic value of units vested					$ 4.1	$ 9.2
Fair value of units vested					12.4	$ 9.8
Unrecognized compensation cost related to non-vested restricted incentive units					$ 13.6
Unrecognized compensation costs, weighted average period for recognition					1 year 7 months 6 days
Performance Shares
Number of Units
Non-vested, beginning of period (in units)			105,080		105,080
Granted (in units)					281,709
Vested (Units)					(2,525)
Non-vested, end of period (Units)					384,264	105,080
Aggregate intrinsic value, end of period (in millions)					$ 7.3
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per unit)			$ 40.50		$ 40.50
Granted (in dollars per unit)					11.58
Vested (in dollars per unit)					41.31
Non-vested, end of period (in dollars per unit)					$ 19.30	$ 40.50
Vesting Period					3 years
Unrecognized compensation cost related to non-vested restricted incentive units					$ 4.1
Unrecognized compensation costs, weighted average period for recognition					1 year 9 months 18 days
Fair value assumptions
Beginning TSR Price	$ 16.75	$ 15.38	$ 15.38	$ 34.24
Risk-free interest rate (as a percent)	0.91%	0.89%	1.10%	0.99%
Volatility factor (as a percent)	52.89%	52.05%	46.02%	33.02%
Distribution yield (as a percent)	6.10%	14.00%	8.60%	2.98%
EnLink Midstream Partners, LP | Restricted Stock Units (RSUs)
Number of Units
Non-vested, beginning of period (in units)			1,253,729		1,253,729
Granted (in units)					1,149,105
Vested (Units)					(316,677)
Forfeited (Units)					(61,337)
Non-vested, end of period (Units)					2,024,820	1,253,729
Aggregate intrinsic value, end of period (in millions)					$ 37.3
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per unit)			$ 29.59		$ 29.59
Granted (in dollars per unit)					10.71
Vested (in dollars per unit)					30.08
Forfeited (in dollars per unit)					21.23
Non-vested, end of period (in dollars per unit)					$ 19.05	$ 29.59
Units withheld for payroll taxes on behalf of employees					91,110
Aggregate intrinsic value of units vested					$ 4.1	$ 7.5
Fair value of units vested					9.5	$ 8.1
Unrecognized compensation cost related to non-vested restricted incentive units					$ 13.9
Unrecognized compensation costs, weighted average period for recognition					1 year 8 months 12 days
EnLink Midstream Partners, LP | Performance Shares
Number of Units
Non-vested, beginning of period (in units)			118,126		118,126
Granted (in units)					293,309
Forfeited (Units)					(2,798)
Non-vested, end of period (Units)					408,637	118,126
Aggregate intrinsic value, end of period (in millions)					$ 7.5
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per unit)			$ 35.41		$ 35.41
Granted (in dollars per unit)					11.53
Forfeited (in dollars per unit)					36.18
Non-vested, end of period (in dollars per unit)					$ 11.53	$ 35.41
Unrecognized compensation cost related to non-vested restricted incentive units					$ 4.1
Unrecognized compensation costs, weighted average period for recognition					1 year 9 months 18 days
Fair value assumptions
Beginning TSR Price	$ 17.71	$ 14.82	$ 14.82	$ 27.68
Risk-free interest rate (as a percent)	0.91%	0.89%	1.10%	0.99%
Volatility factor (as a percent)	44.62%	42.33%	39.71%	33.01%
Distribution yield (as a percent)	8.80%	19.20%	12.10%	5.66%
EnLink Midstream Partners, LP | Minimum | Performance Shares
Weighted Average Grant-Date Fair Value
Vesting (as a percent)					0.00%
EnLink Midstream Partners, LP | Maximum | Performance Shares
Weighted Average Grant-Date Fair Value
Vesting (as a percent)					200.00%