Leases - Finance Lease (Details) - CLECO POWER - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Apr. 30, 2018
Lessee, Lease, Description [Line Items]
Finance lease, loaned amount to purchase the barges			$ 16.8
Gain on measurement recorded as a reduction to accumulated deferred fuel asset	$ 2.2
Finance lease assets, operating lease obligation recognized	0.4
Finance lease, principal interest	2.0	$ 2.2
Sublease income	$ 0.7	$ 2.6