Income Taxes, Effective Tax Rate Reconciliation (Details)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cleco Power [Member]
Effective Income Tax Rate [Line Items]
Effective income tax rates	35.60%	37.60%
Successor [Member]
Effective Income Tax Rate [Line Items]
Effective income tax rates	33.10%
Predecessor [Member]
Effective Income Tax Rate [Line Items]
Effective income tax rates		38.50%