Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Recurring Fair Value Measures

The following tables set forth by level within the fair value hierarchy the company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of Dec. 31, 2012 and 2011.

Recurring Fair Value Measures
	At fair value as of Dec. 31, 2012
(millions)	Level 1		Level 2		Level 3		Total
Assets
Natural gas swaps		$0.0		$0.2		$0.0		$0.2
Diesel fuel swaps		0.0		0.0		0.0		0.0
Total		$0.0		$0.2		$0.0		$0.2
Liabilities
Natural gas swaps		$0.0		$14.3		$0.0		$14.3
Diesel fuel swaps		0.0		0.9		0.0		0.9
Total		$0.0		$15.2		$0.0		$15.2
	At fair value as of Dec. 31, 2011
(millions)	Level 1		Level 2		Level 3		Total
Assets
Natural gas swaps		$0.0		$0.0		$0.0		$0.0
Diesel fuel swaps		0.0		0.9		0.0		0.9
Total		$0.0		$0.9		$0.0		$0.9
Liabilities
Natural gas swaps		$0.0		$65.8		$0.0		$65.8
Diesel fuel swaps		0.0		1.2		0.0		1.2
Total		$0.0		$67.0		$0.0		$67.0

TAMPA ELECTRIC CO [Member]

Schedule of Recurring Fair Value Measures

The following table sets forth by level within the fair value hierarchy TEC’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of Dec. 31, 2012 and 2011.

Recurring Derivative Fair Value Measures
	At fair value as of Dec. 31, 2012
(millions)	Level 1		Level 2		Level 3		Total
Assets
Natural gas swaps	$	0.0		$0.2		$  0.0		$0.2
Total	$	0.0		$0.2		$  0.0		$0.2
Liabilities
Natural gas swaps	$	0.0		$14.3		$  0.0		$14.3
Total	$	0.0		$14.3		$  0.0		$14.3
	At fair value as of Dec. 31, 2011
(millions)	Level 1		Level 2		Level 3		Total
Assets
Natural gas swaps	$	0.0		$0.0		$  0.0		$0.0
Total	$	0.0		$0.0		$  0.0		$0.0
Liabilities
Natural gas swaps	$	0.0		$65.8		$  0.0		$65.8
Total	$	0.0		$65.8		$  0.0		$65.8