Affiliate Transactions - Summary of Charges From Affiliates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Affiliate Transaction [Line Items]
Other operations and maintenance	$ 248,085	$ 230,175	$ 239,212
Other expense	694	11,240	15,061
Cleco Power
Affiliate Transaction [Line Items]
Other operations and maintenance	233,863	216,851	223,257
Other expense	28	7,081	19,561
Cleco Power | Support Group
Affiliate Transaction [Line Items]
Other operations and maintenance	96,907	87,830	91,915
Taxes other than income taxes	65	(41)	40
Other expense	$ 92	$ 60	$ 35