Regulatory Assets and Liabilities, Additional Disclosures (Details) (Cleco Power [Member], USD $) In Millions, unless otherwise specified	36 Months Ended		3 Months Ended
	Apr. 30, 2015 Evangeline [Member] Evangeline Power Purchase Agreement [Member] MW	Mar. 31, 2012 Evangeline [Member] Evangeline Power Purchase Agreement [Member]	Mar. 31, 2014 Fuel and purchased power [Member]	Mar. 31, 2014 Fuel and purchased power [Member] FTRs [Member]
Schedule of Regulatory Assets and Liabilities, Net [Line Items]
Long-term power purchase agreement, term (in years)		3 years
Capacity and energy provided by a power purchase agreement (in MW)	730
Percentage of total fuel cost regulated by LPSC (in hundredths)			88.00%
Increase (decrease) in other regulatory assets			$ 5.5
Decrease in net mark-to-market gains as a result of lower valuation of open FTRs				4.7
Increase in fuel and purchased power costs			$ 0.8