Schedule I Financial Statements of Cleco Corporation, Agreement and Plan of Merger (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Oct. 17, 2014	Dec. 31, 2015	Feb. 26, 2015
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 1	$ 1
Cleco Partners [Member]
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1.00
Share price at the time of the Merger (in dollars per share)			$ 55.37
Subsequent Event [Member] | Cleco Partners [Member]
Business Acquisition [Line Items]
Additional contingency fees payable upon completion of the Merger				$ 12.0
Subsequent Event [Member] | Cleco Partners [Member] | Cleco Corporation [Member]
Business Acquisition [Line Items]
Percentage of shareholder approval of the Merger Agreement (in hundredths)					77.00%