Income Taxes, Uncertain Tax Positions (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Uncertain Tax Positions [Line Items]
Interest payable related to uncertain tax positions		$ 0.0		$ 0.0
Interest expense related to uncertain tax positions		0.0
Liability for uncertain tax positions		0.0
Penalties (for 3 months ended September 30, 2014 the amount is less than)	$ 0.1	0.0	$ 0.1
Cleco Power [Member]
Uncertain Tax Positions [Line Items]
Interest payable related to uncertain tax positions		0.0		$ 0.0
Interest expense related to uncertain tax positions		$ 0.0