Discontinued Operations - Schedule of Reclassification of Continuing Operations to Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss - Cleco Cajun Divestiture			$ 0	$ (44,951)
Income from discontinued operations, net of income taxes	$ 0	$ 12,710	$ 0	44,672
Discontinued Operations, Held-for-sale | Cleco Cajun
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Electric operations		78,727		207,555
Other operations		19,458		50,992
Operating revenue, net		98,185		258,547
Fuel used for electric generation		5,860		21,056
Purchased power		31,095		93,035
Other operations and maintenance		14,300		37,591
Depreciation and amortization		3,915		4,271
Total operating expenses		55,170		155,953
Operating income		43,015		102,594
Other income, net		113		239
Interest, net		662		582
Loss - Cleco Cajun Divestiture		(27,951)		(44,951)
Income from discontinued operations before income taxes		15,839		58,464
Federal and state income tax expense		3,129		13,792
Income from discontinued operations, net of income taxes		$ 12,710		$ 44,672