Regulatory Assets and Liabilities - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 01, 2022	Sep. 30, 2022	Dec. 31, 2021
Regulatory Assets [Line Items]
Total regulatory assets, net		$ 638,478	$ 801,363
Financing costs
Regulatory Assets [Line Items]
Regulatory assets		6,990	7,248
Postretirement costs
Regulatory Assets [Line Items]
Regulatory assets		11,933	13,424
Fair value of long-term debt
Regulatory Assets [Line Items]
Regulatory assets		106,599	112,150
Debt issuance costs
Regulatory Assets [Line Items]
Regulatory assets		4,671	4,920
CLECO POWER
Regulatory Assets [Line Items]
Regulatory assets		675,386	759,165
Regulatory liabilities		(167,101)	(95,544)
Total regulatory assets, net		508,285	663,621
CLECO POWER | Acquisition/ transaction costs
Regulatory Assets [Line Items]
Regulatory assets		$ 1,834	1,913
Regulatory asset, amortization period		17 years 3 months
CLECO POWER | Acquisition/ transaction costs | Coughlin transaction costs
Regulatory Assets [Line Items]
Regulatory assets		$ 823	845
Regulatory asset, amortization period		26 years 9 months
CLECO POWER | Accumulated deferred fuel
Regulatory Assets [Line Items]
Regulatory assets		$ 81,928	56,826
CLECO POWER | Affordability study
Regulatory Assets [Line Items]
Regulatory assets		$ 12,060	13,094
Regulatory asset, amortization period		8 years 9 months
CLECO POWER | AFUDC equity gross-up
Regulatory Assets [Line Items]
Regulatory assets		$ 64,251	66,574
CLECO POWER | AMI deferred revenue requirement
Regulatory Assets [Line Items]
Regulatory assets		$ 1,636	2,045
Regulatory asset, amortization period		3 years 6 months
CLECO POWER | AROs
Regulatory Assets [Line Items]
Regulatory assets		$ 16,653	15,141
CLECO POWER | Bayou Vista to Segura deferred revenue requirement
Regulatory Assets [Line Items]
Regulatory assets		$ 3,765	1,392
Regulatory asset, amortization period		9 months
CLECO POWER | COVID-19 executive order
Regulatory Assets [Line Items]
Regulatory assets		$ 2,953	2,953
CLECO POWER | Deferred storm restoration costs - Hurricane Delta
Regulatory Assets [Line Items]
Regulatory assets		21	17,113
CLECO POWER | Deferred storm restoration costs - Hurricane Ida
Regulatory Assets [Line Items]
Regulatory assets		9,350	37,617
CLECO POWER | Deferred storm restoration costs - Hurricane Laura
Regulatory Assets [Line Items]
Regulatory assets		90	54,282
CLECO POWER | Deferred storm restoration costs - Hurricane Zeta
Regulatory Assets [Line Items]
Regulatory assets		2	3,296
CLECO POWER | Deferred storm restoration costs - Winter Storms Uri & Viola
Regulatory Assets [Line Items]
Regulatory assets		0	1,912
CLECO POWER | Station closure costs | Dolet Hills
Regulatory Assets [Line Items]
Regulatory assets		147,021	145,844
CLECO POWER | Energy efficiency
Regulatory Assets [Line Items]
Regulatory assets		$ 588	1,645
Regulatory asset, amortization period		6 months
CLECO POWER | Financing costs
Regulatory Assets [Line Items]
Regulatory assets		$ 6,549	6,826
CLECO POWER | Interest costs
Regulatory Assets [Line Items]
Regulatory assets		3,272	3,459
CLECO POWER | Mine closure costs | Lignite Mine
Regulatory Assets [Line Items]
Regulatory assets		136,071	136,980
CLECO POWER | Madison Unit 3 property taxes
Regulatory Assets [Line Items]
Regulatory assets		13,028	8,362
Regulatory asset, amortization period	12 months
CLECO POWER | Non-service cost of postretirement benefits
Regulatory Assets [Line Items]
Regulatory assets		14,472	12,950
CLECO POWER | Other assets
Regulatory Assets [Line Items]
Regulatory assets		8,792	11,224
CLECO POWER | Postretirement costs
Regulatory Assets [Line Items]
Regulatory assets		108,524	117,773
CLECO POWER | Production operations and maintenance expenses
Regulatory Assets [Line Items]
Regulatory assets		$ 9,017	11,058
Regulatory asset, amortization period		3 years
CLECO POWER | Rodemacher Unit 2 deferred costs | Rodemacher Unit 2 deferred costs
Regulatory Assets [Line Items]
Regulatory assets		$ 11,210	6,931
CLECO POWER | St. Mary Clean Energy Center
Regulatory Assets [Line Items]
Regulatory assets		$ 8,607	6,089
Regulatory asset, amortization period		2 years 9 months
CLECO POWER | Training costs
Regulatory Assets [Line Items]
Regulatory assets		$ 5,813	5,929
Regulatory asset, amortization period		37 years 3 months
CLECO POWER | Tree trimming costs
Regulatory Assets [Line Items]
Regulatory assets		$ 7,056	9,092
Regulatory asset, amortization period		2 years 6 months
CLECO POWER | Deferred taxes, net
Regulatory Assets [Line Items]
Regulatory liabilities		$ (49,099)	(95,544)
CLECO POWER | Storm reserves
Regulatory Assets [Line Items]
Regulatory liabilities		$ (118,002)	$ 0