Employee Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2011

Employee Postretirement Benefits [Abstract]

Schedule Of Periodic Expense For Pension And Other Postretirement Benefits

		$000,000			$000,000			$000,000		$000,000
(millions)	Pension Benefits						Other Postretirement Benefits
Three months ended Sep. 30,	2011			2010			2011		2010
Components of net periodic benefit expense
Service cost	$	4.0		$	4.0		$	0.5	$	0.8
Interest cost on projected benefit obligations		7.7			8.2			2.8		2.8
Expected return on assets		(9.6	)		(9.0	)		0.0		0.0
Amortization of:
Transition obligation		0.0			0.0			0.5		0.5
Prior service (benefit) cost		(0.1	)		(0.1	)		0.2		0.2
Actuarial loss		2.8			3.2			0.1		0.0
Net pension expense recognized in the TECO Energy Consolidated Condensed Statements of Income	$	4.8		$	6.3		$	4.1	$	4.3
Nine months ended Sep. 30,
Components of net periodic benefit expense
Service cost	$	12.0		$	12.1		$	1.6	$	2.4
Interest cost on projected benefit obligations		23.2			24.9			8.3		8.2
Expected return on assets		(28.8	)		(27.2	)		0.0		0.0
Amortization of:
Transition obligation		(0.3	)		0.0			1.7		1.7
Prior service (benefit) cost		8.4			(0.3	)		0.6		0.6
Actuarial loss		0.0			9.4			0.1		0.0
Pension expense		14.5			18.9			12.3		12.9
Settlement cost		0.0			1.6			0.0		0.0
Net pension expense recognized in the TECO Energy Consolidated Condensed Statements of Income	$	14.5		$	20.5		$	12.3	$	12.9