Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Narrative (Details) - USD ($)					1 Months Ended		3 Months Ended	12 Months Ended
	Jun. 30, 2024	May 17, 2024	Apr. 19, 2024	Feb. 02, 2024	Jan. 31, 2023	Sep. 30, 2015	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2024	Feb. 29, 2020
Litigation [Line Items]
Estimated range of potential loss								$ 11,500,000
Assets held as collateral for third parties								0
Payments under long-term purchase obligations								55,700,000	$ 79,200,000	$ 52,900,000
Performance Guarantee
Litigation [Line Items]
Maximum amount of potential payment								42,400,000
Indemnification Agreement
Litigation [Line Items]
Maximum amount of potential payment								40,000,000.0
Indemnification Agreement, Including Fundamental Organizational Structure
Litigation [Line Items]
Maximum amount of potential payment								400,000,000.0
LPSC | Dolet Hills
Litigation [Line Items]
Decrease in regulatory assets		$ 40,000,000.0
Depreciation		40,000,000.0
Provision for rate refund and electric customer credits								1,300,000
FERC
Litigation [Line Items]
Estimated and recorded refund								500,000
CLECO POWER
Litigation [Line Items]
Estimated range of potential loss								11,000,000.0
Assets held as collateral for third parties								0
Payments under long-term purchase obligations								48,600,000	70,500,000	49,000,000.0
CLECO POWER | Indemnification Agreement
Litigation [Line Items]
Maximum amount of potential payment								40,000,000.0
CLECO POWER | Indemnification Agreement, Including Fundamental Organizational Structure
Litigation [Line Items]
Maximum amount of potential payment								400,000,000.0
CLECO POWER | LPSC
Litigation [Line Items]
Recovery of from energy efficiency programs										$ 8,500,000	$ 6,800,000
Provision for rate refund and electric customer credits							$ 20,000,000.0
CLECO POWER | LPSC | Dolet Hills
Litigation [Line Items]
Loss contingency accrual									$ 58,700,000			$ 1,300,000
Decrease in regulatory assets	$ 12,300,000	40,000,000.0	$ 40,000,000.0
Annual billing credit settlement			20,000,000
Billing credit settlement			60,000,000.0	$ 60,000,000
Securitization amount			$ 305,000,000.0
Depreciation		$ 40,000,000.0
Provision for rate refund and electric customer credits								$ 1,300,000
CLECO POWER | LPSC 2020-2022 Fuel Audit
Litigation [Line Items]
Fuel expenses included in audit					$ 1,100,000,000
Gulf Coast Spinning Start Up Costs
Litigation [Line Items]
Startup costs						$ 6,500,000
Gulf Coast Spinning Construction Of Cotton Spinning Facility
Litigation [Line Items]
Startup costs						$ 60,000,000.0
Gulf Coast Spinning Construction Of Cotton Spinning Facility | Gulf Coast Spinning Company, LLC | Diversified Lands LLC
Litigation [Line Items]
Loans payable													$ 2,000,000