Derivative Instruments - Amount of Gain (Loss) Recognized in Income on Derivatives (Details) - DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	$ 183,811,000	$ 132,128,000	$ 11,231,000
CLECO POWER
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	6,787,000	2,437,000	2,410,000
Price risk derivatives | Accumulated Deferred Fuel | CLECO POWER
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with derivatives	(500,000)	2,800,000	500,000
Price risk derivatives | Electric operations
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	14,118,000	12,797,000	9,213,000
Price risk derivatives | Electric operations | CLECO POWER
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	14,118,000	12,797,000	9,213,000
Price risk derivatives | Purchased power
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	(10,829,000)	(14,813,000)	(10,141,000)
Price risk derivatives | Purchased power | CLECO POWER
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	(7,331,000)	(10,360,000)	(6,803,000)
Natural gas derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in income on derivatives	180,522,000	$ 134,144,000	$ 12,159,000
Natural gas derivatives | CLECO POWER
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivatives held		0	0
Natural gas derivatives | Accumulated Deferred Fuel | CLECO POWER
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses) associated with derivatives	$ 4,900,000