Subsequent Events	9 Months Ended
Sep. 30, 2011
Subsequent Events	16. Subsequent Events TECO Energy, Inc. $200 million bank credit facility amendment On Oct. 25, 2011, TECO Energy, Inc. (TECO Energy) and its wholly-owned subsidiary, TECO Finance, Inc. (TECO Finance), amended their $200 million bank credit facility, entering into a Third Amended and Restated Credit Agreement with ten lenders. Under the amendment, TECO Finance continues to be the Borrower and TECO Energy continues to be the Guarantor. The amendment (i) extends the maturity date of the credit facility from May 9, 2012 to Oct. 25, 2016 (subject to further extension with the consent of each lender); (ii) continues to allow TECO Finance to borrow funds at an interest rate equal to the London interbank deposit rate plus a margin; (iii) as an alternative to the above interest rate, allows TECO Finance to borrow funds at an interest rate equal to a margin plus the higher of the JPMorgan Chase Bank's prime rate, the federal funds rate plus 50 basis points, or the London interbank deposit rate plus 1.00%; (iv) allows TECO Finance to borrow funds on a same-day basis under a new Swingline Loan provision, which loans mature on the fourth Banking Day after which any such loans are made and bear interest at an interest rate as agreed by the Borrower and the relevant Swingline Lender prior to the making of any such loans; (v) allows TECO Finance to request the lenders to increase their commitments under the credit facility by $100 million in the aggregate (compared to $50 million in the aggregate under the previous agreement); (vi) continues to include a $200 million letter of credit facility and (vii) makes other technical changes. Tampa Electric Company $325 million bank credit facility amendment On Oct. 25, 2011, Tampa Electric Company (Tampa Electric) amended its $325 million bank credit facility, entering into a Third Amended and Restated Credit Agreement with ten lenders. The amendment (i) extends the maturity date of the credit facility from May 9, 2012 to Oct. 25, 2016 (subject to further extension with the consent of each lender); (ii) continues to allow Tampa Electric to borrow funds at a rate equal to the London interbank deposit rate plus a margin (iii) as an alternative to the above interest rate, allows Tampa Electric to borrow funds at an interest rate equal to a margin plus the higher of Citibank's prime rate, the federal funds rate plus 50 basis points, or the London interbank deposit rate plus 1.00%; (iv) allows Tampa Electric to borrow funds on a same-day basis under a new Swingline Loan provision, which loans mature on the fourth Banking Day after which any such loans are made and bear interest at an interest rate as agreed by the Borrower and the relevant Swingline Lender prior to the making of any such loans; (v) continues to allow Tampa Electric to request the lenders to increase their commitments under the credit facility by up to $175 million in the aggregate; (vi) includes a $200 million letter of credit facility (compared to $50 million under the previous agreement); and (vii) makes other technical changes.
Tampa Electric Co [Member]
Subsequent Events	14. Subsequent Events Tampa Electric Company $325 million bank credit facility amendment On Oct. 25, 2011, Tampa Electric Company (Tampa Electric) amended its $325 million bank credit facility, entering into a Third Amended and Restated Credit Agreement with ten lenders. The amendment (i) extends the maturity date of the credit facility from May 9, 2012 to Oct. 25, 2016 (subject to further extension with the consent of each lender); (ii) continues to allow Tampa Electric to borrow funds at a rate equal to the London interbank deposit rate plus a margin (iii) as an alternative to the above interest rate, allows Tampa Electric to borrow funds at an interest rate equal to a margin plus the higher of Citibank's prime rate, the federal funds rate plus 50 basis points, or the London interbank deposit rate plus 1.00%; (iv) allows Tampa Electric to borrow funds on a same-day basis under a new Swingline Loan provision, which loans mature on the fourth Banking Day after which any such loans are made and bear interest at an interest rate as agreed by the Borrower and the relevant Swingline Lender prior to the making of any such loans; (v) continues to allow Tampa Electric to request the lenders to increase their commitments under the credit facility by up to $175 million in the aggregate; (vi) includes a $200 million letter of credit facility (compared to $50 million under the previous agreement); and (vii) makes other technical changes.

Subsequent Events

9 Months Ended

Sep. 30, 2011

16. Subsequent Events

TECO Energy, Inc. $200 million bank credit facility amendment

On Oct. 25, 2011, TECO Energy, Inc. (TECO Energy) and its wholly-owned subsidiary, TECO Finance, Inc. (TECO Finance), amended their $200 million bank credit facility, entering into a Third Amended and Restated Credit Agreement with ten lenders. Under the amendment, TECO Finance continues to be the Borrower and TECO Energy continues to be the Guarantor. The amendment (i) extends the maturity date of the credit facility from May 9, 2012 to Oct. 25, 2016 (subject to further extension with the consent of each lender); (ii) continues to allow TECO Finance to borrow funds at an interest rate equal to the London interbank deposit rate plus a margin; (iii) as an alternative to the above interest rate, allows TECO Finance to borrow funds at an interest rate equal to a margin plus the higher of the JPMorgan Chase Bank's prime rate, the federal funds rate plus 50 basis points, or the London interbank deposit rate plus 1.00%; (iv) allows TECO Finance to borrow funds on a same-day basis under a new Swingline Loan provision, which loans mature on the fourth Banking Day after which any such loans are made and bear interest at an interest rate as agreed by the Borrower and the relevant Swingline Lender prior to the making of any such loans; (v) allows TECO Finance to request the lenders to increase their commitments under the credit facility by $100 million in the aggregate (compared to $50 million in the aggregate under the previous agreement); (vi) continues to include a $200 million letter of credit facility and (vii) makes other technical changes.

Tampa Electric Company $325 million bank credit facility amendment

On Oct. 25, 2011, Tampa Electric Company (Tampa Electric) amended its $325 million bank credit facility, entering into a Third Amended and Restated Credit Agreement with ten lenders. The amendment (i) extends the maturity date of the credit facility from May 9, 2012 to Oct. 25, 2016 (subject to further extension with the consent of each lender); (ii) continues to allow Tampa Electric to borrow funds at a rate equal to the London interbank deposit rate plus a margin (iii) as an alternative to the above interest rate, allows Tampa Electric to borrow funds at an interest rate equal to a margin plus the higher of Citibank's prime rate, the federal funds rate plus 50 basis points, or the London interbank deposit rate plus 1.00%; (iv) allows Tampa Electric to borrow funds on a same-day basis under a new Swingline Loan provision, which loans mature on the fourth Banking Day after which any such loans are made and bear interest at an interest rate as agreed by the Borrower and the relevant Swingline Lender prior to the making of any such loans; (v) continues to allow Tampa Electric to request the lenders to increase their commitments under the credit facility by up to $175 million in the aggregate; (vi) includes a $200 million letter of credit facility (compared to $50 million under the previous agreement); and (vii) makes other technical changes.

Tampa Electric Co [Member]

Subsequent Events

14. Subsequent Events

Tampa Electric Company $325 million bank credit facility amendment