Discontinued Operations - Schedule of Assets and Liabilities (Details) - Discontinued Operations, Held-for-sale - Cleco Cajun Sale Group - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating revenue, net
Cash, cash equivalents, and restricted cash equivalents	$ 4,100	$ 4,067
Accounts receivable	70,001	57,822
Fuel inventory, at average cost	47,243	33,153
Materials and supplies, at average cost	36,283	34,195
Energy risk management assets	1,066	518
Property, plant, and equipment, net	648,676	649,067
Prepayments	18,587	23,601
Other assets	20,207	23,619
Loss recognized on classification as held for sale	(173,000)	0
Total assets held for sale - discontinued operations	705,732	862,590
Accounts payable	30,442	56,609
Deferred lease revenue	19,945	22,246
Intangible liabilities	12,695	13,956
Asset retirement obligations	46,165	63,725
Other liabilities	5,705	6,508
Total liabilities held for sale - discontinued operations	114,952	163,044
Other
Operating revenue, net
Intangible assets - other	$ 32,569	$ 36,548