Disclosures about Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Apr. 13, 2016
Revenue
Electric operations	$ 619,500	$ 462,164	$ 1,509,093	$ 1,180,345
Other operations	61,771	55,721	167,042	150,777
Affiliate revenue	0	0	0	0
Electric customer credits	(6,728)	(691)	(6,992)	(40,185)
Operating revenue, net	674,543	517,194	1,669,143	1,290,937
Net income	68,372	119,910	225,479	219,059
Depreciation and amortization	62,079	64,338	206,767	180,199
Interest income	2,238	941	4,236	2,416
Interest charges	39,890	34,629	109,818	101,812
Federal and state income tax expense (benefit)	5,611	30,569	29,551	30,985
Other corporate costs and noncash items	2,648	71	5,888	(4,259)
EBITDA	176,362	248,576	573,267	525,380
Additions to property, plant, and equipment			145,514	207,257
Equity investment in investees	2,072		2,072		$ 2,072
Goodwill	1,490,797		1,490,797		1,490,797	$ 1,490,000
Total assets	8,484,521		8,484,521		8,125,018
CLECO POWER
Revenue
Electric operations	481,153	357,084	1,145,864	887,191
Other operations	24,757	22,779	62,528	57,674
Affiliate revenue	1,657	1,380	4,744	4,259
Electric customer credits	(6,728)	(691)	(6,992)	(40,429)
Operating revenue, net	500,839	380,552	1,206,144	908,695
Net income	40,733	56,561	134,462	102,407
Interest income	1,726	936	3,501	2,404
Interest charges	23,840	18,509	63,947	55,392
Federal and state income tax expense (benefit)	1,862	548	5,800	(219)
Additions to property, plant, and equipment			139,726	200,237
Equity investment in investees	2,072		2,072		2,072
Total assets	5,459,751		5,459,751		5,129,501
Power supply agreements
Revenue
Amortization of intangible assets	6,400	6,400	19,200	19,200
OPERATING SEGMENTS
Revenue
Electric operations	621,920	464,584	1,516,353	1,187,606
Other operations	64,330	57,937	174,425	156,525
Affiliate revenue	1,657	1,380	4,744	4,259
Electric customer credits	(6,728)	(691)	(6,992)	(40,185)
Operating revenue, net	681,179	523,210	1,688,530	1,308,205
Net income	80,474	143,305	266,652	256,126
Depreciation and amortization	57,704	56,149	193,641	163,148
Interest income	2,198	940	4,162	2,414
Interest charges	24,059	19,626	64,200	56,178
Federal and state income tax expense (benefit)	16,323	30,436	52,936	52,342
EBITDA	176,362	248,576	573,267	525,380
Additions to property, plant, and equipment			144,570	206,141
Equity investment in investees	2,072		2,072		2,072
Goodwill	1,490,797		1,490,797		1,490,797
Total assets	8,060,886		8,060,886		7,724,388
OPERATING SEGMENTS | CLECO POWER
Revenue
Electric operations	481,153	357,084	1,145,864	887,191
Other operations	24,757	22,779	62,528	57,674
Affiliate revenue	1,657	1,380	4,744	4,259
Electric customer credits	(6,728)	(691)	(6,992)	(40,429)
Operating revenue, net	500,839	380,552	1,206,144	908,695
Net income	40,733	56,561	134,462	102,407
Depreciation and amortization	44,368	43,526	133,907	126,534
Interest income	1,726	936	3,501	2,404
Interest charges	23,840	18,509	63,947	55,392
Federal and state income tax expense (benefit)	1,862	548	5,800	(219)
EBITDA	109,077	118,208	334,615	281,710
Additions to property, plant, and equipment			139,726	200,237
Equity investment in investees	2,072		2,072		2,072
Goodwill	1,490,797		1,490,797		1,490,797
Total assets	6,950,548		6,950,548		6,620,298
OPERATING SEGMENTS | CLECO CAJUN
Revenue
Electric operations	140,767	107,500	370,489	300,415
Other operations	39,573	35,158	111,897	98,851
Affiliate revenue	0	0	0	0
Electric customer credits	0	0	0	244
Operating revenue, net	180,340	142,658	482,386	399,510
Net income	39,741	86,744	132,190	153,719
Depreciation and amortization	13,336	12,623	59,734	36,614
Interest income	472	4	661	10
Interest charges	219	1,117	253	786
Federal and state income tax expense (benefit)	14,461	29,888	47,136	52,561
EBITDA	67,285	130,368	238,652	243,670
Additions to property, plant, and equipment			4,844	5,904
Equity investment in investees	0		0		0
Goodwill	0		0		0
Total assets	1,110,338		1,110,338		1,104,090
Amortization of deferred lease income	(2,300)	(2,300)	(6,900)	(6,900)
OPERATING SEGMENTS | CLECO CAJUN | Power supply agreements
Revenue
Amortization of intangible assets and liabilities	3,600	3,600	10,800	10,000
OTHER
Revenue
Electric operations	(2,420)	(2,420)	(7,260)	(7,260)
Other operations	1	1	5	4
Affiliate revenue	29,583	32,116	82,728	85,392
Electric customer credits	0	0	0	0
Operating revenue, net	27,164	29,697	75,473	78,136
Net income	(12,103)	(23,396)	(41,173)	(37,068)
Depreciation and amortization	4,375	8,189	13,127	17,052
Interest income	58	43	141	100
Interest charges	15,850	15,044	45,684	45,732
Federal and state income tax expense (benefit)	(10,712)	133	(23,384)	(21,357)
Additions to property, plant, and equipment			944	1,116
Equity investment in investees	(305,348)		(305,348)		(46,901)
Goodwill	0		0		0
Total assets	248,847		248,847		619,101
OTHER | Power supply agreements | CLECO POWER
Revenue
Amortization of intangible assets	2,400	2,400	7,300	7,300
ELIMINATIONS
Revenue
Electric operations	0	0	0	(1)
Other operations	(2,560)	(2,217)	(7,388)	(5,752)
Affiliate revenue	(31,240)	(33,496)	(87,472)	(89,651)
Electric customer credits	0	0	0	0
Operating revenue, net	(33,800)	(35,713)	(94,860)	(95,404)
Net income	1	1	0	1
Depreciation and amortization	0	0	(1)	(1)
Interest income	(18)	(42)	(67)	(98)
Interest charges	(19)	(41)	(66)	(98)
Federal and state income tax expense (benefit)	0	$ 0	(1)	0
Additions to property, plant, and equipment			0	$ 0
Equity investment in investees	305,348		305,348		46,901
Goodwill	0		0		0
Total assets	$ 174,788		$ 174,788		$ (218,471)