Consolidated Statements of Capital (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Beginning Balance	$ 2,291.8		$ 2,267.2		$ 2,170.6
Net income	197.7		213.0		272.9
Other comprehensive income, after tax	17.8		(9.0)		(4.8)
Common stock issued	5.9		(2.9)		1.0
Cash dividends declared	(191.2)		(190.4)		(183.2)
Stock compensation expense	13.5		12.0		9.1
Noncontrolling - dividends			(0.3)		(0.6)
Tax benefits - stock compensation			2.8		2.2
Ending Balance	2,333.7		2,291.8		2,267.2
Noncontrolling - sale of business			(0.6)
Restricted stock - dividends	1.1
Tax short fall - stock compensation	(2.9)
Common Stock [Member]
Beginning Balance	216.6		215.8		214.9
Beginning Balance, shares	216.6	[1]	215.8	[1]	214.9	[1]
Common stock issued	0.7		0.8		0.9
Common stock issued, shares	0.7	[1]	0.8	[1]	0.9	[1]
Ending Balance	217.3		216.6		215.8
Ending Balance, shares	217.3	[1]	216.6	[1]	215.8	[1]
Additional Paid-in Capital [Member]
Beginning Balance	1,564.5		1,553.4		1,542.0
Common stock issued	5.2		(3.7)		0.1
Stock compensation expense	13.5		12.0		9.1
Tax benefits - stock compensation			2.8		2.2
Ending Balance	1,581.3		1,564.5		1,553.4
Restricted stock - dividends	1.0
Tax short fall - stock compensation	(2.9)
Retained Earnings [Member]
Beginning Balance	541.7		519.4		430.0
Net income	197.7		212.7		272.6
Cash dividends declared	(191.2)		(190.4)		(183.2)
Ending Balance	548.3		541.7		519.4
Restricted stock - dividends	0.1
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(31.0)		(22.0)		(17.2)
Other comprehensive income, after tax	17.8		(9.0)		(4.8)
Ending Balance	(13.2)		(31.0)		(22.0)
Noncontrolling Interest [Member]
Beginning Balance			0.6		0.9
Net income			0.3		0.3
Noncontrolling - dividends			(0.3)		(0.6)
Ending Balance	0		0		0.6
Noncontrolling - sale of business			$ (0.6)

[1] (1) TECO Energy had a maximum of 400.0 million shares of $1 par value common stock authorized as of Dec. 31, 2013, 2012, 2011 and 2010.