Discontinued Operations - Schedule of Assets and Liabilities (Details) - Discontinued Operations, Held-for-sale - CLECO CAJUN - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash, cash equivalents, and restricted cash equivalents	$ 4,273	$ 4,100
Accounts receivable	47,015	70,001
Fuel inventory, at average cost	59,380	47,243
Materials and supplies, at average cost	36,929	36,283
Energy risk management assets	432	1,066
Property, plant, and equipment, net	651,433	648,676
Prepayments	22,595	18,587
Other assets	20,385	20,207
Accumulated loss recognized on classification as held for sale	(190,000)	(173,000)
Total assets held for sale - discontinued operations	685,011	705,732
Accounts payable	31,753	30,442
Deferred lease revenue	19,945	19,945
Intangible liabilities	12,695	12,695
Asset retirement obligations	46,678	46,165
Other liabilities	6,312	5,705
Total liabilities held for sale - discontinued operations	117,383	114,952
Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intangible assets - other	$ 32,569	$ 32,569