Summary of Significant Accounting Policies - AFUDC (Details)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Public Utilities, General Disclosures [Line Items]
AFUDC composite rate, pretax basis	7.33%	8.65%	8.11%
AFUDC composite rate, net of tax	6.46%	7.62%	6.50%
CLECO POWER
Public Utilities, General Disclosures [Line Items]
AFUDC composite rate, pretax basis	7.33%	8.65%	8.11%
AFUDC composite rate, net of tax	6.46%	7.62%	6.50%

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/1943274/2147478698/980-835-25-1

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/1943274/2147479123/980-835-45-1

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