Segment Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Apr. 13, 2016
Revenue
Electric operations	$ 361,838	$ 478,733	$ 916,554	$ 1,138,604
Other operations	31,984	24,759	84,030	62,533
Affiliate revenue	0	0	0	0
Electric customer credits	24	(6,728)	(1,362)	(6,992)
Operating revenue, net	393,846	496,764	999,222	1,194,145
Net income	156,112	68,372	99,420	225,479
Depreciation and amortization	52,378	48,743	155,743	147,034
Interest income	1,283	1,766	3,223	3,575
Interest charges	42,034	37,706	122,289	105,494
Federal and state income tax expense (benefit)	(246,494)	9,220	(121,160)	30,472
Other corporate costs and noncash items	16,604	(75,058)	111,509	(224,862)
Income from continuing operations, net of income taxes	298,841	90,232	109,127	280,052
Loss from discontinued operations, net of income taxes	(142,729)	(21,860)	(9,707)	(54,573)
EBITDA	162,080	109,077	374,285	334,615
Additions to property, plant, and equipment			165,750	145,514
Equity investment in investees	1,992		1,992		$ 2,072
Goodwill	1,490,797		1,490,797		1,490,797	$ 1,490,000
Total assets	8,292,099		8,292,099		8,253,749
Power supply agreements
Revenue
Amortization of intangible assets	2,323	2,420	7,131	7,260
CLECO POWER
Revenue
Electric operations	364,161	481,153	923,685	1,145,864
Other operations	31,984	24,757	84,028	62,528
Affiliate revenue	1,645	1,657	4,967	4,744
Electric customer credits	24	(6,728)	(1,362)	(6,992)
Operating revenue, net	397,814	500,839	1,011,318	1,206,144
Net income	90,914	40,733	157,170	134,462
Interest income	1,215	1,726	2,979	3,501
Interest charges	24,921	23,840	73,442	63,947
Federal and state income tax expense (benefit)	(552)	1,862	4,185	5,800
Additions to property, plant, and equipment			159,947	139,726
Equity investment in investees	1,992		1,992		2,072
Total assets	5,460,639		5,460,639		5,344,173
OPERATING SEGMENTS
Revenue
Depreciation and amortization		44,368
OPERATING SEGMENTS | CLECO POWER
Revenue
Electric operations	364,161	481,153	923,685	1,145,864
Other operations	31,984	24,757	84,028	62,528
Affiliate revenue	1,645	1,657	4,967	4,744
Electric customer credits	24	(6,728)	(1,362)	(6,992)
Operating revenue, net	397,814	500,839	1,011,318	1,206,144
Net income	90,914	40,733	157,170	134,462
Depreciation and amortization	48,012	44,368	142,467	133,907
Interest income	1,215	1,726	2,979	3,501
Interest charges	24,921	23,840	73,442	63,947
Federal and state income tax expense (benefit)	(552)	1,862	4,185	5,800
Income from continuing operations, net of income taxes	90,914	40,733	157,170	134,462
Loss from discontinued operations, net of income taxes	0	0	0	0
EBITDA	162,080	109,077	374,285	334,615
Additions to property, plant, and equipment			159,947	139,726
Equity investment in investees	1,992		1,992		2,072
Goodwill	1,490,797		1,490,797		1,490,797
Total assets	6,951,436		6,951,436		6,834,970
OTHER
Revenue
Electric operations	(2,323)	(2,420)	(7,131)	(7,260)
Other operations	0	1	1	5
Affiliate revenue	30,253	29,583	86,669	82,728
Electric customer credits	0	0	0	0
Operating revenue, net	27,930	27,164	79,539	75,473
Net income	65,198	27,639	(57,750)	91,018
Depreciation and amortization	4,365	4,375	13,276	13,127
Interest income	81	58	357	141
Interest charges	17,125	13,884	48,961	41,614
Federal and state income tax expense (benefit)	(245,942)	7,358	(125,345)	24,672
Income from continuing operations, net of income taxes	207,927	49,499	(48,043)	145,591
Loss from discontinued operations, net of income taxes	(142,729)	(21,860)	(9,707)	(54,573)
Additions to property, plant, and equipment			5,803	5,788
Equity investment in investees	370,348		370,348		(320,348)
Goodwill	0		0		0
Total assets	1,154,811		1,154,811		1,237,096
OTHER | CLECO POWER | Power supply agreements
Revenue
Amortization of intangible assets	2,300	2,400	7,100	7,300
ELIMINATIONS
Revenue
Electric operations	0	0	0	0
Other operations	0	1	1	0
Affiliate revenue	(31,898)	(31,240)	(91,636)	(87,472)
Electric customer credits	0	0	0	0
Operating revenue, net	(31,898)	(31,239)	(91,635)	(87,472)
Net income	0	0	0	(1)
Depreciation and amortization	1	0	0	0
Interest income	(13)	(18)	(113)	(67)
Interest charges	(12)	(18)	(114)	(67)
Federal and state income tax expense (benefit)	0	0	0	0
Income from continuing operations, net of income taxes	0	0	0	(1)
Loss from discontinued operations, net of income taxes	0	$ 0	0	0
Additions to property, plant, and equipment			0	$ 0
Equity investment in investees	(370,348)		(370,348)		320,348
Goodwill	0		0		0
Total assets	$ 185,852		$ 185,852		$ 181,683