Discontinued Operations - Schedule of Assets and Liabilities (Details) - Discontinued Operations, Held-for-sale - CLECO CAJUN - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and restricted cash equivalents	$ 4,091	$ 4,067
Accounts receivable	58,733	57,822
Fuel inventory, at average cost	93,971	33,153
Materials and supplies, at average cost	35,860	34,195
Energy risk management assets	1,398	518
Property, plant, and equipment, net	636,523	649,067
Prepayments	24,655	23,601
Other assets	21,563	23,619
Loss recognized on classification as held for sale	(154,000)	0
Total assets held for sale - discontinued operations	755,363	862,590
Accounts payable	46,209	59,434
Deferred lease revenue	19,945	22,246
Intangible liabilities	12,695	13,956
Asset retirement obligations	45,702	63,725
Other liabilities	12,526	7,647
Total liabilities held for sale - discontinued operations	137,077	167,008
Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intangible assets - other	$ 32,569	$ 36,548