Variable Interest Entities - Schedule of Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Total equity investment in investee	$ 1,916	$ 1,916	$ 1,916	$ 1,916	$ 1,916
Operating revenue	406,770	340,135	1,023,775	869,162
Operating expenses	(286,563)	(224,166)	(734,932)	(705,301)
Interest income	(4,062)	(6,366)	(15,227)	(10,427)
Net income (loss)	90,049	87,207	197,329	48,308
CLECO POWER
Schedule of Equity Method Investments [Line Items]
Purchase price	12,873		12,873		12,873
Cash contributions	6,399		6,399		6,399
Distributions	(18,033)		(18,033)		(18,033)
Equity income from investee	677		677		677
Total equity investment in investee	1,916		1,916		$ 1,916
Operating revenue	405,621	337,367	1,019,914	878,112
Operating expenses	(283,213)	(221,065)	(724,706)	(684,828)
Interest income	(1,408)	(1,065)	(7,434)	(3,257)
Net income (loss)	100,398	93,068	229,012	114,318
CLECO POWER | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Operating revenue	57	55	230	306
Operating expenses	(57)	(55)	(230)	(209)
Gain on sale of property	0	0	0	1,356
Interest income	0	0	0	(97)
Net income (loss)	$ 0	$ 0	$ 0	$ 1,356