Segment Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2023
Revenue
Electric operations	$ 251,471	$ 293,928
Other operations	27,218	27,304
Affiliate revenue	0	0
Electric customer credits	(1,847)	(651)
Operating revenue, net	276,842	320,581
Net loss	(57,231)	(104,022)
Depreciation and amortization	98,375	55,209
Interest income	1,408	1,267
Interest charges	40,762	39,488
Federal and state income tax expense (benefit)	37,671	43,693
Other corporate costs and noncash items	22,385	84,145
Loss from continuing operations, net of income taxes	(89,193)	(123,075)
Income from discontinued operations, net of income taxes	31,962	19,053
EBITDA	108,592	98,193
Additions to property, plant, and equipment	36,964	60,099
Equity investment in investees	1,916			$ 1,992
Goodwill	1,490,797			1,490,797
Total assets	8,056,962			8,100,393
Power supply agreements
Revenue
Amortization of intangible assets	2,323	2,420
CLECO POWER
Revenue
Electric operations	253,794	296,348
Other operations	27,218	27,303
Affiliate revenue	8,869	1,688
Electric customer credits	(1,847)	(651)
Operating revenue, net	288,034	324,688
Net loss	(6,648)	22,817
Interest income	1,288	1,185
Interest charges	23,484	24,338
Federal and state income tax expense (benefit)	(960)	1,490
Equity investment in investees	1,916			1,992
Total assets	5,374,263			5,429,542
CLECO CAJUN | Natural gas derivatives
Revenue
Net gain (loss) recognized in income on derivatives	(10,900)		$ (77,400)
CLECO POWER
Revenue
Net loss	(6,648)
OPERATING SEGMENTS
Revenue
Additions to property, plant, and equipment	36,964
OPERATING SEGMENTS | CLECO POWER
Revenue
Electric operations	253,794	296,348
Other operations	27,218	27,303
Affiliate revenue	8,869	1,688
Electric customer credits	(1,847)	(651)
Operating revenue, net	288,034	324,688
Net loss	(6,648)	22,817
Depreciation and amortization	94,004	50,733
Interest income	1,288	1,185
Interest charges	23,484	24,338
Federal and state income tax expense (benefit)	(960)	1,490
Loss from continuing operations, net of income taxes	(6,648)	22,817
Income from discontinued operations, net of income taxes	0	0
EBITDA	108,592	98,193
Additions to property, plant, and equipment	39,494	58,066
Equity investment in investees	1,916			1,992
Goodwill	1,490,797			1,490,797
Total assets	6,865,060			6,920,339
OTHER
Revenue
Electric operations	(2,323)	(2,420)
Other operations	0	1
Affiliate revenue	29,667	27,514
Electric customer credits	0	0
Operating revenue, net	27,344	25,095
Net loss	(50,583)	(126,839)
Depreciation and amortization	4,371	4,476
Interest income	293	143
Interest charges	17,452	15,211
Federal and state income tax expense (benefit)	38,631	42,203
Loss from continuing operations, net of income taxes	(82,545)	(145,892)
Income from discontinued operations, net of income taxes	31,962	19,053
Additions to property, plant, and equipment	(2,530)	2,033
Equity investment in investees	(507,329)			(467,329)
Goodwill	0			0
Total assets	822,793			870,743
OTHER | CLECO POWER | Power supply agreements
Revenue
Amortization of intangible assets	2,300	2,400
ELIMINATIONS
Revenue
Electric operations	0	0
Other operations	0	0
Affiliate revenue	(38,536)	(29,202)
Electric customer credits	0	0
Operating revenue, net	(38,536)	(29,202)
Net loss	0	0
Depreciation and amortization	0	0
Interest income	(173)	(61)
Interest charges	(174)	(61)
Federal and state income tax expense (benefit)	0	0
Loss from continuing operations, net of income taxes	0	0
Income from discontinued operations, net of income taxes	0	0
Additions to property, plant, and equipment	0	$ 0
Equity investment in investees	507,329			467,329
Goodwill	0			0
Total assets	$ 369,109			$ 309,311