Intangible Assets - Schedule of Securitized Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Total securitized intangible assets carrying value	$ 715,284	$ 415,946
Accumulated amortization	(40,723)	(31,038)
Net securitized intangible assets subject to amortization	674,561	384,908
CLECO POWER
Finite-Lived Intangible Assets [Line Items]
Total securitized intangible assets carrying value	715,284	415,946
Accumulated amortization	(40,723)	(31,038)
Net securitized intangible assets subject to amortization	674,561	384,908
Storm Recovery Property
Finite-Lived Intangible Assets [Line Items]
Total securitized intangible assets carrying value	415,946	415,946
Net securitized intangible assets subject to amortization	378,488	384,908
Storm Recovery Property | CLECO POWER
Finite-Lived Intangible Assets [Line Items]
Total securitized intangible assets carrying value	415,946	415,946
Net securitized intangible assets subject to amortization	378,488	384,908
Energy Transition Property
Finite-Lived Intangible Assets [Line Items]
Total securitized intangible assets carrying value	299,338	0
Net securitized intangible assets subject to amortization	296,073	0
Energy Transition Property | CLECO POWER
Finite-Lived Intangible Assets [Line Items]
Total securitized intangible assets carrying value	299,338	0
Net securitized intangible assets subject to amortization	$ 296,073	$ 0