Employee Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

Compensation And Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Cost

Included in the table below is the periodic expense for pension and other postretirement benefits offered by the company.

Pension Expense
(millions)	Pension Benefits						Other Postretirement Benefits
Three months ended Jun 30,	2014			2013			2014			2013
Components of net periodic benefit expense
Service cost	$	4.2		$	4.3		$	0.6		$	0.5
Interest cost on projected benefit obligations		8.2			7.2			2.6			2.4
Expected return on assets		(10.4	)		(9.5	)		0.0			0.0
Amortization of:
Prior service (benefit) cost		(0.1	)		(0.1	)		(0.1	)		(0.1	)
Actuarial loss		3.5			5.3			0.1			0.2
Net pension expense recognized in the
TECO Energy Consolidated Condensed Statements of Income	$	5.4		$	7.2		$	3.2		$	3.0
Six months ended Jun 30,
Components of net periodic benefit expense
Service cost	$	8.3		$	9.1		$	1.2		$	1.2
Interest cost on projected benefit obligations		16.4			14.4			5.2			4.7
Expected return on assets		(20.7	)		(19.2	)		0.0			0.0
Amortization of:
Prior service (benefit) cost		(0.2	)		(0.2	)		(0.1	)		(0.2	)
Actuarial loss		6.7			10.3			0.1			0.5
Net pension expense recognized in the
TECO Energy Consolidated Condensed Statements of Income	$	10.5		$	14.4		$	6.4		$	6.2