Income Taxes, Effective Tax Rate Reconciliation (Details)		3 Months Ended				6 Months Ended
	Apr. 12, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2016	Apr. 12, 2016	Jun. 30, 2017	Jun. 30, 2016
Cleco Power
Effective Income Tax Rate [Line Items]
Effective income tax rates		39.20%	38.90%			38.10%	39.60%
Successor
Effective Income Tax Rate [Line Items]
Effective income tax rates		38.90%		38.90%		37.80%
Predecessor
Effective Income Tax Rate [Line Items]
Effective income tax rates	27.10%				(704.90%)