Regulatory Assets and Liabilities - Narrative (Details)					1 Months Ended		12 Months Ended
	Jul. 01, 2022	Jul. 01, 2021	Jun. 16, 2021 USD ($)	Apr. 13, 2016 instrument	May 31, 2021	May 31, 2013 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2011 USD ($) treasury_rate_lock	Dec. 31, 2010	Jun. 30, 2021 USD ($)	Mar. 29, 2021 USD ($)	Dec. 31, 2020 USD ($)	Oct. 31, 2016 USD ($)
Excess A D I T | LPSC
Regulatory Assets and Liabilities [Line Items]
Regulatory liability							$ 302,000,000					$ 352,400,000
Treasury Lock
Regulatory Assets and Liabilities [Line Items]
Number of instruments settled | instrument				2
AMI deferred revenue requirement
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							11 years
COVID-19 executive order
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							4 years
Financing costs
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							$ 7,248,000					7,592,000
Postretirement costs
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							13,424,000					15,411,000
CLECO POWER
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							759,165,000					456,034,000
Regulatory liability							95,544,000					180,565,000
CLECO POWER | Deferred storm restoration costs - Winter Storms Uri & Viola
Regulatory Assets and Liabilities [Line Items]
Capitalized storm restoration costs							8,100,000				$ 50,000,000
Capitalized storm restoration costs, amortization period					12 months
CLECO POWER | Deferred storm restoration costs - Hurricane Ida
Regulatory Assets and Liabilities [Line Items]
Capitalized storm restoration costs							52,100,000
CLECO POWER | Corporate franchise tax, net
Regulatory Assets and Liabilities [Line Items]
Regulatory liability							$ 0					763,000
Regulatory liabilities amortization period (in years/months)							12 months
CLECO POWER | Excess A D I T | LPSC
Regulatory Assets and Liabilities [Line Items]
Regulatory liability							$ 302,000,000					352,400,000
Regulatory liabilities amortization period (in years/months)			3 years
CLECO POWER | AFUDC
Regulatory Assets and Liabilities [Line Items]
Regulatory liability							$ 0					4,218,000
CLECO POWER | Treasury Lock
Regulatory Assets and Liabilities [Line Items]
Number of treasury locks | treasury_rate_lock								2
Loss on settlements								$ 26,800,000
CLECO POWER | Interest Rate Swap
Regulatory Assets and Liabilities [Line Items]
Loss on settlements						$ 3,300,000
CLECO POWER | Acadia Unit 1 acquisition costs
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							30 years
Total regulatory assets							$ 1,913,000					2,019,000
CLECO POWER | Accumulated deferred fuel
Regulatory Assets and Liabilities [Line Items]
Percentage of total fuel cost regulated by the LPSC							76.00%
Total regulatory assets							$ 56,826,000					28,194,000
CLECO POWER | Affordability study
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period		10 years
Total regulatory assets			$ 13,600,000				13,094,000					0
CLECO POWER | AMI deferred revenue requirement
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							2,045,000					2,591,000
CLECO POWER | Bayou Vista to Segura deferred revenue requirement
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets			$ 1,400,000				$ 1,392,000					0
CLECO POWER | Bayou Vista to Segura deferred revenue requirement | Forecast | Subsequent Event
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period	12 months
CLECO POWER | Acquisition costs or transaction costs | Natural Gas Processing Plant
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							35 years
Total regulatory assets							$ 845,000					876,000
CLECO POWER | COVID-19 executive order
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							2,953,000					2,953,000
CLECO POWER | Accelerated depreciation | RODEMACHER UNIT 2
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							$ 6,931,000					1,333,000
CLECO POWER | Energy efficiency
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							4 years
Total regulatory assets							$ 1,645,000					2,820,000
CLECO POWER | Financing costs
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							6,826,000					7,184,000
CLECO POWER | Financing costs | Treasury Lock
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets								$ 7,400,000
CLECO POWER | Financing costs | Interest Rate Swap
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets						$ 2,900,000
CLECO POWER | Lignite Mine closure costs | Lignite Mine
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							136,980,000					0
CLECO POWER | Other
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							$ 11,224,000					4,229,000
CLECO POWER | Postretirement costs
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							6 years
Total regulatory assets							$ 117,773,000					165,437,000
CLECO POWER | Production O&M Expenses
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							3 years
Total regulatory assets							$ 9,700,000					0
Retail jurisdictional portion							34,900,000
CLECO POWER | Production O&M Expenses | MAXIMUM
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							25,000,000
CLECO POWER | St. Mary Clean Energy Center
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period		4 years
Total regulatory assets							6,089,000					3,479,000
CLECO POWER | Training costs
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period									50 years
Total regulatory assets							5,929,000					6,085,000
CLECO POWER | Tree trimming costs
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							$ 9,092,000					11,807,000
Maximum amount of costs approved to defer													$ 10,900,000
CLECO POWER | Madison Unit 3 property taxes
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							12 months
Total regulatory assets							$ 8,362,000					0
CLECO POWER | Northlake Transmission Agreement, Under Collection
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period		12 months
Total regulatory assets							2,900,000			$ 5,700,000
CLECO POWER | Other Deferred Costs, Primarily Base Rate Case
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period		4 years
Total regulatory assets							3,600,000
CLECO POWER | Coughlin Pipeline Project, Deferred Revenue
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period		4 years
Total regulatory assets							4,700,000
CLECO POWER | Production operations and maintenance expenses
Regulatory Assets and Liabilities [Line Items]
Total regulatory assets							$ 11,058,000					4,058,000
CLECO POWER | Production operations and maintenance expenses | DOLET HILLS POWER STATION
Regulatory Assets and Liabilities [Line Items]
Regulatory assets amortization period							20 years
Total regulatory assets							$ 145,844,000					$ 48,982,000