Affiliate Transactions - Summary of Charges From Affiliates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Affiliate Transaction [Line Items]
Other operations and maintenance	$ 253,528	$ 248,085	$ 230,175
Other expense	13,021	694	11,240
Cleco Power
Affiliate Transaction [Line Items]
Other operations and maintenance	245,651	233,863	216,851
Other expense	11,151	28	7,081
Cleco Power | Support Group
Affiliate Transaction [Line Items]
Other operations and maintenance	99,547	96,907	87,830
Taxes other than income taxes	0	65	(41)
Other expense	242	92	60
Cleco Power | Cleco Holdings
Affiliate Transaction [Line Items]
Other expense	$ 625	$ 0	$ 0