Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
	Nov. 22, 2023	Feb. 28, 2019	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge			$ 17,000	$ 96,000
Discontinued Operations, Held-for-sale | CLECO CAJUN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration	$ 600,000
Disposal group including discontinued operation consideration payable at closing date	500,000
Disposal group including discontinued operation consideration payable at after closing date	$ 100,000
Disposal group including discontinued operation consideration payable period after closing date	24 months
Impairment charge			17,000	$ 96,000
Accumulated loss recognized on classification as held for sale			190,000		$ 173,000
LPSC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt repayment commitment		$ 400,000
Long-term debt outstanding			$ 66,700