Income Taxes - Current and Deferred Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Components of Income Tax Expense [Line Items]
Current federal income tax (benefit) expense	$ (46,955)	$ (45,429)	$ 25,478
Deferred federal income tax expense (benefit)	42,380	(7,137)	(9,835)
Amortization of accumulated deferred investment tax credits	(115)	(127)	(134)
Total federal income tax (benefit) expense	(4,690)	(52,693)	15,509
Current state income tax expense (benefit)	18,833	(9,787)	10,326
Deferred state income tax benefit	(87)	(2,593)	(5,800)
Total state income tax expense (benefit)	18,746	(12,380)	4,526
Total tax expense (benefit)	14,056	(65,073)	20,035
Items charged or credited directly to member’s equity
Total tax expense (benefit) from items charged directly to member’s equity	973	(1,905)	8,728
Total federal and state income tax expense (benefit)	15,029	(66,978)	28,763
Federal deferred income tax
Items charged or credited directly to member’s equity
Total tax expense (benefit) from items charged directly to member’s equity	646	(1,374)	6,297
State deferred income tax
Items charged or credited directly to member’s equity
Total tax expense (benefit) from items charged directly to member’s equity	327	(531)	2,431
CLECO POWER
Components of Income Tax Expense [Line Items]
Current federal income tax (benefit) expense	4,189	11,188	4,921
Deferred federal income tax expense (benefit)	12,736	(20,029)	(1,926)
Amortization of accumulated deferred investment tax credits	(114)	(127)	(134)
Total federal income tax (benefit) expense	16,811	(8,968)	2,861
Current state income tax expense (benefit)	2,052	5,617	2,406
Deferred state income tax benefit	(357)	(1,083)	(2,764)
Total state income tax expense (benefit)	1,695	4,534	(358)
Total tax expense (benefit)	18,506	(4,434)	2,503
Items charged or credited directly to member’s equity
Total tax expense (benefit) from items charged directly to member’s equity	348	(736)	3,618
Total federal and state income tax expense (benefit)	18,854	(5,170)	6,121
CLECO POWER | Federal deferred income tax
Items charged or credited directly to member’s equity
Total tax expense (benefit) from items charged directly to member’s equity	67	(528)	2,610
CLECO POWER | State deferred income tax
Items charged or credited directly to member’s equity
Total tax expense (benefit) from items charged directly to member’s equity	$ 281	$ (208)	$ 1,008