Leases - Finance Lease (Details) - CLECO POWER $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) event	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 30, 2018 barge
Lessee, Lease, Description [Line Items]
Finance lease, number of cancellation events triggering early termination | event	1
Finance lease, number of cancellation events | event	4
Finance lease, principal interest | $	$ 2.2	$ 2.2	$ 2.2
Sublease income | $	$ 2.6	$ 0.6	$ 0.2
Maritime Equipment
Lessee, Lease, Description [Line Items]
Finance lease, number of leased assets | barge				42