Mergers and Acquisitions (Tables) - NMGI [Member]

9 Months Ended

Sep. 30, 2015

Pro Forma Impact of Acquisition	Three months ended		Nine months ended
(millions, except per share amounts)	Sept. 30, 2014		Sept. 30, 2014
Revenues	$	720.0	$	2,111.0
Net income from continuing operations	$	70.8	$	199.3
Basic and Diluted EPS from continuing operations	$	0.31	$	0.86

After-tax transaction and integration charges recognized in connection with the acquisition

The following after-tax transaction and integration charges were recognized in connection with the NMGI acquisition and are included in the TECO Energy Consolidated Statements of Operations for the three and nine months ended Sept. 30, 2015 and 2014.

Transaction and Integration Costs	Three months ended Sept. 30,					Nine months ended Sept. 30,
(millions)	2015		2014			2015		2014
Legal and other consultants	$	0.1	$	5.3		$	0.4	$	7.2
Bridge loan costs		0.0		0.4			0.0		2.9
Severance and relocation costs		0.0		1.7			0.5		1.7
Other costs and tax benefit		0.1		(6.5	)		0.3		(6.1	)
Total accounting charges	$	0.2	$	0.9		$	1.2	$	5.7