A segregation of retained earnings which is unavailable for dividend distribution. Includes also retained earnings appropriated for loss contingencies.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(a)(4)(i))
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Topic 210
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-Name Accounting Standards Codification
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Name:	us-gaap_RetainedEarningsAppropriated
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Summary of Significant Accounting Policies - Recent Authoritative Guidance (Details) - USD ($)	Mar. 01, 2024	Dec. 31, 2023
Public Utilities, General Disclosures [Line Items]
DOE congressional appropriation		$ 9,000,000
Cleco Power
Public Utilities, General Disclosures [Line Items]
Retained earnings, congressional appropriation		$ 2,800,000
Cleco Power \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Retained earnings, congressional appropriation	$ 1,400,000