Affiliate Transactions - Summary of Revenue Received From Affiliates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Affiliate Transaction [Line Items]
Affiliate revenue	$ 0	$ 0	$ 0
Cleco Power
Affiliate Transaction [Line Items]
Affiliate revenue	8,904	6,377	5,641
Total	19,112	16,590	13,257
Cleco Power | Support Group
Affiliate Transaction [Line Items]
Affiliate revenue	5,651	5,475	4,783
Cleco Power | Cleco Cajun
Affiliate Transaction [Line Items]
Other operations revenue	10,208	10,213	7,616
Affiliate revenue	$ 3,253	$ 902	$ 858