Regulatory Assets and Liabilities, Additional Disclosures (Details) - USD ($) $ in Millions	1 Months Ended		2 Months Ended
	Dec. 31, 2016	Nov. 30, 2016	Dec. 31, 2016
Regulatory Assets [Line Items]
Derecognized fair value adjustment and debt issuance costs related to debt redemption			$ 19.8
Unsecured Debt [Member] | Cleco Power's solid waste disposal facility bonds, 4.70%, due 2036, callable after November 1, 2016 [Member] | Cleco Power [Member]
Regulatory Assets [Line Items]
Extinguishment of Debt, Amount		$ 60.0
Unsecured Debt [Member] | Cleco Power's senior notes, 6.65%, due 2018 [Member] | Cleco Power [Member]
Regulatory Assets [Line Items]
Extinguishment of Debt, Amount	$ 250.0