Fair Value Accounting and Financial Instruments - Fair Value of Derivative Instruments as Recorded in Condensed Consolidated Balance Sheets (Details) - DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS - USD ($)	Sep. 30, 2022	Dec. 31, 2021
GROSS ASSET (LIABILITY)
Commodity-related contracts, net	$ 203,644,000	$ 93,607,000
GROSS AMOUNTS OFFSET ON THE BALANCE SHEET
Derivative, contract netting		0
Derivative, collateral	(36,400,000)	0
NET ASSET (LIABILITY) ON THE BALANCE SHEET
Net asset (liability) on the balance sheet	167,244,000	93,607,000
GROSS AMOUNTS NOT OFFSET ON THE BALANCE SHEET
Collateral, assets	(108,007,000)	(15,000,000)
NET AMOUNT
Net amount	59,237,000	78,607,000
CLECO POWER
GROSS ASSET (LIABILITY)
Commodity-related contracts, net	4,738,000	4,918,000
Price risk derivatives
GROSS ASSET (LIABILITY)
Derivative asset	5,977,000	6,977,000
Derivative liability	(3,982,000)	(834,000)
GROSS AMOUNTS OFFSET ON THE BALANCE SHEET
Derivative asset, contract netting		0
Derivative liability, contract netting		0
Derivative asset, collateral	0
Derivative liability, collateral	0
NET ASSET (LIABILITY) ON THE BALANCE SHEET
Derivative asset	5,977,000	6,977,000
Derivative liability	(3,982,000)	(834,000)
GROSS AMOUNTS NOT OFFSET ON THE BALANCE SHEET
Collateral, assets	0	0
Collateral, liability	0	0
NET AMOUNT
Derivative asset, net	5,977,000	6,977,000
Derivative liability, net	(3,982,000)	(834,000)
Price risk derivatives | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative liability	(457,000)	(597,000)
Price risk derivatives | Energy risk management assets, current | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative asset	5,195,000	5,515,000
Natural gas derivatives
GROSS ASSET (LIABILITY)
Derivative liability	(1,539,000)	(559,000)
GROSS AMOUNTS OFFSET ON THE BALANCE SHEET
Derivative liability, contract netting		559,000
Derivative liability, collateral	0
NET ASSET (LIABILITY) ON THE BALANCE SHEET
Derivative liability	(1,539,000)	0
GROSS AMOUNTS NOT OFFSET ON THE BALANCE SHEET
Collateral, liability	0	0
NET AMOUNT
Derivative liability, net	(1,539,000)	0
Natural gas derivatives | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative liability	(100,000)
Natural gas derivatives | Energy risk management assets, current
GROSS ASSET (LIABILITY)
Derivative asset	105,206,000	37,061,000
GROSS AMOUNTS OFFSET ON THE BALANCE SHEET
Derivative asset, contract netting		(559,000)
Derivative asset, collateral	(30,271,000)
NET ASSET (LIABILITY) ON THE BALANCE SHEET
Derivative asset	74,935,000	36,502,000
GROSS AMOUNTS NOT OFFSET ON THE BALANCE SHEET
Collateral, assets	(73,669,000)	(15,000,000)
NET AMOUNT
Derivative asset, net	1,266,000	21,502,000
Natural gas derivatives | Energy risk management assets, noncurrent
GROSS ASSET (LIABILITY)
Derivative asset	97,982,000	50,962,000
GROSS AMOUNTS OFFSET ON THE BALANCE SHEET
Derivative asset, contract netting		0
Derivative asset, collateral	(6,129,000)
NET ASSET (LIABILITY) ON THE BALANCE SHEET
Derivative asset	91,853,000	50,962,000
GROSS AMOUNTS NOT OFFSET ON THE BALANCE SHEET
Collateral, assets	(34,338,000)	0
NET AMOUNT
Derivative asset, net	$ 57,515,000	$ 50,962,000