XML 117 R1.htm IDEA: XBRL DOCUMENT v2.4.0.6
Document and Entity Information (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Feb. 15, 2013
Jun. 29, 2012
Entity Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Trading Symbol TE    
Entity Registrant Name TECO ENERGY INC    
Entity Central Index Key 0000350563    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   217,255,694  
Entity Public Float     $ 3.85
TAMPA ELECTRIC CO [Member]
     
Entity Information [Line Items]      
Entity Registrant Name TAMPA ELECTRIC COMPANY    
Entity Central Index Key 0000096271    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Common Stock, Shares Outstanding   10  
Entity Public Float     $ 0