Pension Plan and Employee Benefits - Schedule of Current and Non-Current Portions of SERP Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Current	$ 13,864	$ 26,439
Non-current	160,675	166,702
SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	4,815	4,815
Non-current	58,254	58,728
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	9,127	21,701
Non-current	103,901	109,464
CLECO POWER | SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	833	833
Non-current	$ 10,047	$ 10,160