Regulatory Assets and Liabilities - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Regulatory Assets [Line Items]
Total regulatory assets, net	$ 640,305	$ 801,363
Financing costs
Regulatory Assets [Line Items]
Regulatory assets	7,076	7,248
Postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	12,430	13,424
Fair value of long-term debt
Regulatory Assets [Line Items]
Regulatory assets	108,449	112,150
Debt issuance costs
Regulatory Assets [Line Items]
Regulatory assets	4,754	4,920
CLECO POWER
Regulatory Assets [Line Items]
Regulatory assets	691,111	759,165
Regulatory liabilities	(183,515)	(95,544)
Total regulatory assets, net	507,596	663,621
CLECO POWER | Acquisition/ transaction costs
Regulatory Assets [Line Items]
Regulatory assets	$ 1,860	1,913
Regulatory asset, amortization period	17 years 6 months
CLECO POWER | Acquisition/ transaction costs | Coughlin transaction costs
Regulatory Assets [Line Items]
Regulatory assets	$ 830	845
Regulatory asset, amortization period	27 years
CLECO POWER | Accumulated deferred fuel
Regulatory Assets [Line Items]
Regulatory assets	$ 93,376	56,826
CLECO POWER | Affordability study
Regulatory Assets [Line Items]
Regulatory assets	$ 12,405	13,094
Regulatory asset, amortization period	9 years
CLECO POWER | AFUDC equity gross-up
Regulatory Assets [Line Items]
Regulatory assets	$ 65,025	66,574
CLECO POWER | AMI deferred revenue requirement
Regulatory Assets [Line Items]
Regulatory assets	$ 1,772	2,045
Regulatory asset, amortization period	3 years 9 months
CLECO POWER | AROs
Regulatory Assets [Line Items]
Regulatory assets	$ 16,148	15,141
CLECO POWER | Bayou Vista to Segura deferred revenue requirement
Regulatory Assets [Line Items]
Regulatory assets	$ 5,020	1,392
Regulatory asset, amortization period	1 year
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	768	17,113
CLECO POWER | Deferred storm restoration costs - Hurricane Ida
Regulatory Assets [Line Items]
Regulatory assets	9,281	37,617
CLECO POWER | Deferred storm restoration costs - Hurricane Laura
Regulatory Assets [Line Items]
Regulatory assets	2,437	54,282
CLECO POWER | Deferred storm restoration costs - Hurricane Zeta
Regulatory Assets [Line Items]
Regulatory assets	148	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	145,892	145,844
CLECO POWER | Energy efficiency
Regulatory Assets [Line Items]
Regulatory assets	$ 940	1,645
Regulatory asset, amortization period	9 months
CLECO POWER | Financing costs
Regulatory Assets [Line Items]
Regulatory assets	$ 6,641	6,826
CLECO POWER | Interest costs
Regulatory Assets [Line Items]
Regulatory assets	3,334	3,459
CLECO POWER | Mine closure costs | Lignite Mine
Regulatory Assets [Line Items]
Regulatory assets	135,176	136,980
CLECO POWER | Madison Unit 3 property taxes
Regulatory Assets [Line Items]
Regulatory assets	12,993	8,362
CLECO POWER | Non-service cost of postretirement benefits
Regulatory Assets [Line Items]
Regulatory assets	14,033	12,950
CLECO POWER | Other
Regulatory Assets [Line Items]
Regulatory assets	10,129	11,224
CLECO POWER | Postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	111,607	117,773
CLECO POWER | Production operations and maintenance expenses
Regulatory Assets [Line Items]
Regulatory assets	$ 9,757	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	$ 9,780	6,931
CLECO POWER | St. Mary Clean Energy Center
Regulatory Assets [Line Items]
Regulatory assets	$ 5,219	6,089
Regulatory asset, amortization period	3 years
CLECO POWER | Training costs
Regulatory Assets [Line Items]
Regulatory assets	$ 5,852	5,929
Regulatory asset, amortization period	37 years 6 months
CLECO POWER | Tree trimming costs
Regulatory Assets [Line Items]
Regulatory assets	$ 7,735	9,092
Regulatory asset, amortization period	2 years 9 months
CLECO POWER | Deferred taxes, net
Regulatory Assets [Line Items]
Regulatory liabilities	$ (65,857)	(95,544)
CLECO POWER | Storm reserves
Regulatory Assets [Line Items]
Regulatory liabilities	$ (117,658)	$ 0