Debt, Credit Facilities (Details) (Credit Facility [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Cleco Corporation [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	$ 62.0
Maximum borrowing capacity	250.0
Line of Credit Facility, Remaining Borrowing Capacity	188.0
Facility Fees (in hundredths)	0.175%
Cleco Power [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	0
Maximum borrowing capacity	300.0
Line of Credit Facility, Remaining Borrowing Capacity	298.0
Letters of Credit Outstanding, Amount	$ 2.0
Facility Fees (in hundredths)	0.10%
LIBOR [Member] | Cleco Corporation [Member]
Line of Credit Facility [Line Items]
All-in interest rate (in hundredths)	1.255%
Credit facility, Basis Spread on Variable Rate (in hundredths)	1.075%
LIBOR [Member] | Cleco Power [Member]
Line of Credit Facility [Line Items]
Credit facility, Basis Spread on Variable Rate (in hundredths)	0.90%
ABR [Member] | Cleco Corporation [Member]
Line of Credit Facility [Line Items]
Credit facility, Basis Spread on Variable Rate (in hundredths)	0.075%