Debt - Current Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 614,826	$ 264,934
Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	255,212	265,087
Unamortized debt issuance costs	(269)	(153)
Long-term debt due within one year	254,943	264,934
Cleco Holdings
Short-Term Debt [Line Items]
Long-term debt due within one year	614,943	264,934
Unamortized debt issuance costs	(117)	0
Long-term debt due within one year	614,826	264,934
Senior notes, 3.68%, due 2025 \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 0	75,000
Interest rate	3.68%
Senior notes, 3.47%, due 2026 \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 130,000	0
Interest rate	3.47%
Senior notes, 5.96%, due 2026 \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 100,000	0
Interest rate	5.96%
Series A GO Zone bonds, 2.50%, due 2038, mandatory tender in 2025 \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 0	50,000
Interest rate	2.50%
Bank term loan, variable rate \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 0	125,000
Cleco Securitization I storm recovery bonds, 4.016%, due 2033 \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 15,699	15,087
Interest rate	4.016%
Cleco Securitization II energy transition bonds, 4.680%, due 2036 \| Cleco Power
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 9,513	0
Interest rate	4.68%
Senior notes, 3.743%, due 2026
Short-Term Debt [Line Items]
Interest rate	3.743%
Senior notes, 3.743%, due 2026 \| Cleco Holdings
Short-Term Debt [Line Items]
Long-term debt due within one year	$ 360,000	$ 0
Interest rate	3.743%

Long-Term Debt and Lease Obligation, Gross, Current

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-1A

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
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-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

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Amount of long-term debt and lease obligation, classified as current.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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