Leases - Supplemental Balance Sheet and Cash Flow Information and Other Supplemental Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Lease, Right-Of-Use Asset [Abstract]
Operating lease right of use assets	$ 14,905	$ 20,070
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ 0	$ 10,360
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, and equipment	Property, plant, and equipment
Lease, Right-Of-Use Asset	$ 14,905	$ 30,430
Lease, Liability, Current [Abstract]
Operating Lease, Liability, Current	$ 2,754	$ 2,973
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance leases classified as long-term debt due within one year	$ 0	$ 925
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term debt due within one year	Long-term debt due within one year
Lease, Liability, Noncurrent [Abstract]
Operating lease liabilities	$ 12,788	$ 17,276
Finance Lease, Liability, Noncurrent	$ 0	$ 12,046
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt and finance leases, net	Long-term debt and finance leases, net
Lease, Liability	$ 15,542	$ 33,220
Cash Flow, Operating And Financing Activities, Lessee [Abstract]
Operating Lease, Payments	3,663	3,571
Finance Lease, Interest Payment on Liability	1,175	1,367
Finance Lease, Principal Payments	$ 844	$ 836
Operating Lease, Weighted Average Information [Abstract]
Weighted-average remaining lease term	11 years 8 months 12 days	12 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	4.16%	4.30%
Finance Lease, Weighted Average Information [Abstract]
Weighted-average remaining lease term		9 years 3 months 18 days
Finance Lease, Weighted Average Discount Rate, Percent		10.18%
CLECO POWER
Lease, Right-Of-Use Asset [Abstract]
Operating lease right of use assets	$ 14,905	$ 20,070
Finance Lease, Right-of-Use Asset, after Accumulated Amortization		10,400
Lease, Liability, Current [Abstract]
Operating Lease, Liability, Current	2,754
Finance leases classified as long-term debt due within one year	0	925
Lease, Liability, Noncurrent [Abstract]
Operating lease liabilities	$ 12,788	$ 17,276