Introduction - Narrative (Details) (Plant Smith Units 1 and 2 [Member], Gulf Power [Member])	0 Months Ended
	Feb. 06, 2015 MW
Plant Smith Units 1 and 2 [Member] | Gulf Power [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Capacity Of Units Included In Request For Decertification Of Units (in MWs)	357