Summary of Significant Accounting Policies, Risk Management (Details) $ in Millions	Dec. 31, 2015 USD ($) MMBTU	Dec. 31, 2014 USD ($) MMBTU
Cleco Power [Member] | Natural Gas Derivative [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of open natural gas positions | MMBTU	0	0
Energy risk management assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
FTRs in Energy risk management asset	$ 7.7	$ 10.8
Energy risk management assets | Cleco Power [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
FTRs in Energy risk management asset	7.7	10.8
Energy risk management liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
FTRs in Energy risk management liability	0.3	0.8
Energy risk management liabilities | Cleco Power [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
FTRs in Energy risk management liability	$ 0.3	$ 0.8