Consolidated Condensed Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income attributable to TECO Energy	$ 212.7	$ 272.6	$ 239.0
Other comprehensive income (loss), net of tax
Net unrealized (losses) gains on cash flow hedges	(4.2)	(0.8)	3.1
Amortization of unrecognized benefit costs and other	(4.8)	(4.6)	3.7
Recognized benefit costs due to settlement	0	0.6	1.0
Other comprehensive (loss) income, net of tax	(9.0)	(4.8)	7.8
Comprehensive income attributable to TECO Energy	$ 203.7	$ 267.8	$ 246.8