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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 20, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
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    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity File Number 1-5007    
Entity Address, Address Line One TECO Plaza    
Entity Address, Address Line Two 702 N. Franklin Street    
Entity Address, City or Town Tampa    
Entity Address, State or Province FL    
Entity Tax Identification Number 59-0475140    
Entity Incorporation, State or Country Code FL    
Entity Address, Postal Zip Code 33602    
City Area Code (813)    
Local Phone Number 228-1111    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity Common Stock, Shares Outstanding   10  
Entity Public Float     $ 0
Auditor Name Ernst & Young LLP    
Auditor Location Tampa, Florida    
Auditor Firm ID 42    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Tampa Electric Company (the Company) as of December 31, 2024 and 2023, the related consolidated statements of income and comprehensive income, capitalization and cash flows for each of the three years in the period ended December 31, 2024, and the related notes and financial statement schedule listed in the Index at Item 15(a) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.