Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Asset Retirement Obligations

Reconciliation of beginning and ending carrying amount of asset retirement obligations:
	Dec. 31,
(millions)	2013			2012
Beginning balance	$	28.6		$	53.8
Additional liabilities		0.1			0.7
Liabilities settled		(1.4	)		(29.1	)
Accretion expense		1.4			1.4
Revisions to estimated cash flows		(0.3	)		0.0
Other (1)		0.2			1.8
Ending balance	$	28.6		$	28.6

(1) Accretion recorded as a deferred regulatory asset.

Tampa Electric Company [Member]

Schedule of Asset Retirement Obligations

Reconciliation of beginning and ending carrying amount of asset retirement obligations:
	Dec. 31,
(millions)	2013			2012
Beginning balance	$	5.0		$	30.8
Additional liabilities		0.1			0.0
Liabilities settled		(0.2	)		(27.6	)
Revisions to estimated cash flows		(0.3	)		0.0
Other (1)		0.2			1.8
Ending balance	$	4.8		$	5.0

(1) Accretion recorded as a deferred regulatory asset.