Affiliate Transactions - Summary of Revenue Received From Affiliates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Affiliate Transaction [Line Items]
Other operations	$ 103,277	$ 111,565	$ 98,768
Affiliate revenue	0	0	0
Gross operating revenue	1,151,648	1,299,480	1,612,154
Cleco Power
Affiliate Transaction [Line Items]
Other operations	95,137	111,561	98,759
Affiliate revenue	12,452	8,904	6,377
Gross operating revenue	1,158,842	1,317,834	1,628,202
Cleco Power | Related Party
Affiliate Transaction [Line Items]
Gross operating revenue	15,874	19,112	16,590
Cleco Power | Cleco Cajun
Affiliate Transaction [Line Items]
Other operations	3,422	10,208	10,213
Affiliate revenue	7,385	3,253	902
Cleco Power | Support Group
Affiliate Transaction [Line Items]
Affiliate revenue	4,938	5,651	5,475
Cleco Power | Cleco Holdings
Affiliate Transaction [Line Items]
Affiliate revenue	$ 129	$ 0	$ 0