Debt, Credit Facilities (Details) (Line of Credit [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014 Cleco Power [Member]	Mar. 31, 2014 Parent Company [Member]	Apr. 08, 2014 Subsequent Event [Member] Cleco Power [Member]
Line of Credit Facility [Line Items]
Line of credit facility, amount outstanding	$ 0	$ 15.0
Line of credit facility, current borrowing capacity	300.0	250.0
Letters of credit outstanding, amount	$ 1.0		$ 2.0