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Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2011
Subsequent Event [Abstract]
Subsequent Event	Note 16 — Subsequent Event On October 13, 2011, Cleco settled the 2001 through 2003 audit cycle with the IRS. As a result of the settlement, Cleco made a miscellaneous other federal income tax payment in accordance with Revenue Procedure 2001-18 in the amount of $13.0 million, and no interest was assessed. Cleco will reverse $30.9 million of previously accrued federal and state interest expense and the corresponding deferred tax benefit of $11.9 million. Cleco expects its effective tax rate to increase approximately 4.55% for the year.