Intangible Assets, Intangible Liabilities, and Goodwill - Schedule of Amortization of Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
LTSA
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible liabilities	$ 3,484	$ 3,484	$ 3,234
Power supply agreements
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible liabilities	2,378	3,528	3,194
Cleco Katrina/Rita right to bill and collect storm recover charges
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	0	517	20,576
Cleco Katrina/Rita right to bill and collect storm recover charges | Cleco Power
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	0	517	20,576
Trade name
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	3,897	255	255
Power supply agreements
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 25,600	$ 25,600	$ 24,273