Summary of Significant Accounting Policies - AFUDC and Capitalized Interest (Details)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
AFUDC composite rate, pretax basis	8.11%	9.06%	10.05%
AFUDC composite rate, net of tax	6.50%	7.09%	7.81%
CLECO POWER
Public Utilities, General Disclosures [Line Items]
AFUDC composite rate, pretax basis	8.11%	9.06%	10.05%
AFUDC composite rate, net of tax	6.50%	7.09%	7.81%

Effective rate, including composite rate, of cost of financing additions to qualifying regulated assets, commonly called allowance for funds used during construction.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481668/980-835-25-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482064/980-835-45-1

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration