Segment Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Revenue
Base revenue	$ 190,635	$ 165,130	$ 373,035	$ 316,836
Fuel cost recovery revenue	99,017	64,040	186,559	163,805
Other operations	32,109	23,563	57,411	50,781
Affiliate revenue	0	0	0	0
Electric customer credits	0	(548)	0	(2,395)
Operating revenue, net	321,761	252,185	617,005	529,027
Depreciation and amortization	53,391	49,002	103,487	147,377
Interest income	4,032	2,653	11,165	4,061
Interest charges	37,651	40,922	74,072	81,683
Federal and state income tax expense (benefit)	10,014	(35,956)	19,071	1,715
Income (loss) from continuing operations, net of income taxes	47,897	48,580	88,209	(40,613)
Income from discontinued operations, net of income taxes	0	12,710	0	44,672
Net income	47,897	61,290	88,209	4,059
Additions to property, plant, and equipment	141,470	123,812
Equity investment in investee	1,916	1,916	1,916	1,916	$ 1,916
Goodwill	1,490,797	1,490,797	1,490,797	1,490,797	1,490,797
Total segment assets	7,631,523	7,369,606	7,631,523	7,369,606	7,369,606
Other corporate costs and noncash items	(1,345)	(72)	(321)	22,313
EBITDA	143,576	99,823	273,353	208,414
Power supply agreements
Revenue
Amortization of intangible assets	186	186	372	2,509
CLECO POWER
Revenue
Other operations	30,381	22,382	53,837	49,599
Affiliate revenue	245	1,522	490	10,391
Electric customer credits	0	(548)	0	(2,395)
Operating revenue, net	320,464	252,712	614,293	540,745
Interest income	1,435	904	6,026	2,192
Interest charges	26,249	25,116	51,934	48,599
Federal and state income tax expense (benefit)	12,563	2,072	24,446	1,112
Net income	55,151	26,786	104,168	20,138
Equity investment in investee	1,916		1,916		1,916
Total segment assets	5,651,703		5,651,703		$ 5,388,769
Cleco Cajun | Natural gas derivatives
Revenue
Net gain (loss) recognized in income on derivatives	4,400		(6,500)
OPERATING SEGMENTS | CLECO POWER
Revenue
Base revenue	190,821	165,316	373,407	319,345
Fuel cost recovery revenue	99,017	64,040	186,559	163,805
Other operations	30,381	22,382	53,837	49,599
Affiliate revenue	245	1,522	490	10,391
Electric customer credits		(548)		(2,395)
Operating revenue, net	320,464	252,712	614,293	540,745
Recoverable fuel and purchased power	99,001	64,055	186,561	163,843
Non-recoverable fuel and purchased power	2,995	5,817	6,144	13,612
Other operations and maintenance	62,611	59,636	120,517	116,430
Taxes other than income taxes	13,825	13,475	29,443	29,121
Other segment items	(1,544)	9,906	(1,725)	9,325
Depreciation and amortization	51,048	46,753	98,831	140,757
Interest income	1,435	904	6,026	2,192
Interest charges	26,249	25,116	51,934	48,599
Federal and state income tax expense (benefit)	12,563	2,072	24,446	1,112
Income (loss) from continuing operations, net of income taxes		26,786	104,168	20,138
Income from discontinued operations, net of income taxes		0		0
Net income	55,151	26,786	104,168	20,138
Additions to property, plant, and equipment	141,430	120,378
Equity investment in investee	1,916	1,916	1,916	1,916
Goodwill	1,490,797	1,490,797	1,490,797	1,490,797
Total segment assets	7,142,500	6,879,566	7,142,500	6,879,566
EBITDA	143,576	99,823	273,353	208,414
Administrative and general	23,500	21,400	46,300	42,100
OTHER
Revenue
Base revenue	(186)	(186)	(372)	(2,509)
Fuel cost recovery revenue	0	0	0	0
Other operations	1,738	1,181	3,593	1,182
Affiliate revenue	16,594	27,756	37,425	57,423
Electric customer credits		0		0
Operating revenue, net	18,146	28,751	40,646	56,096
Depreciation and amortization	2,343	2,249	4,656	6,619
Interest income	2,657	1,814	5,362	2,107
Interest charges	11,461	15,871	22,361	33,322
Federal and state income tax expense (benefit)	(2,549)	(38,028)	(5,375)	603
Income (loss) from continuing operations, net of income taxes		21,794	(15,959)	(60,751)
Income from discontinued operations, net of income taxes		12,710		44,672
Net income	(7,254)	34,504	(15,959)	(16,079)
Additions to property, plant, and equipment	40	3,434
Equity investment in investee	(848,952)	(848,952)	(848,952)	(848,952)
Goodwill	0	0	0	0
Total segment assets	(322,387)	(286,556)	(322,387)	(286,556)
OTHER | CLECO POWER | Power supply agreements
Revenue
Amortization of intangible assets	200	200	400	2,500
ELIMINATIONS
Revenue
Base revenue	0	0	0	0
Fuel cost recovery revenue	0	0	0	0
Other operations	(10)	0	(19)	0
Affiliate revenue	(16,839)	(29,278)	(37,915)	(67,814)
Electric customer credits		0		0
Operating revenue, net	(16,849)	(29,278)	(37,934)	(67,814)
Depreciation and amortization	0	0	0	1
Interest income	(60)	(65)	(223)	(238)
Interest charges	(59)	(65)	(223)	(238)
Federal and state income tax expense (benefit)	0	0	0	0
Income (loss) from continuing operations, net of income taxes		0	0	0
Income from discontinued operations, net of income taxes		0		0
Net income	0	0	0	0
Additions to property, plant, and equipment	0	0
Equity investment in investee	848,952	848,952	848,952	848,952
Goodwill	0	0	0	0
Total segment assets	$ 811,410	$ 776,596	$ 811,410	$ 776,596