Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Risks and Uncertainties (Details) - CLECO POWER $ in Millions	1 Months Ended
	Jun. 30, 2020 USD ($)
Oxbow
Loss Contingencies [Line Items]
Costs to be billed	$ 3.7
Dolet Hills Power Station
Loss Contingencies [Line Items]
Increase in ARO liabilities	3.5
Investment balance	155.6
Dolet Hills Power Station | DHLC
Loss Contingencies [Line Items]
Costs to be billed	170.4
Oxbow | Oxbow
Loss Contingencies [Line Items]
Costs to be billed	$ 12.9