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Schedule I Financial Statements of Cleco Corporation, Condensed Balance Sheet Parentheticals (Details) - USD ($)
$ / shares in Units, $ in Millions
Apr. 13, 2016
Apr. 12, 2016
Dec. 31, 2015
Dec. 31, 2014
Cleco Holdings [Member]        
Condensed Financial Statements, Captions [Line Items]        
Common stock, par value (in dollars per share) $ 1.00      
Predecessor [Member]        
Condensed Financial Statements, Captions [Line Items]        
Premium on common stock   $ 414.6 $ 418.5 $ 415.5
Common Stock, Value, Issued   61.1 61.1 61.1
Treasury Stock, Value   $ 20.5 $ 23.2 $ 25.3