Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Aug. 01, 2011
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Entity Registrant Name	TECO ENERGY INC
Entity Central Index Key	0000350563
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Teco Energy Inc [Member]
Entity Common Stock, Shares Outstanding		215,722,727
Tampa Electric Co [Member]
Entity Registrant Name	TAMPA ELECTRIC CO
Entity Central Index Key	0000096271
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		10