NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'BBB' long-term Issuer Default Rating (IDR) for TECO Energy Inc. (TE) following the announced acquisition of TE by Emera Inc. (Emera; not rated by Fitch). Fitch has also affirmed the 'BBB' senior unsecured debt rating for TECO Finance, Inc. The Rating Outlook is Stable. The debt issued by TECO Finance, Inc. is fully guaranteed by TE. The ratings of TE's wholly-owned regulated utility subsidiary Tampa Electric Co. (Tampa Electric; 'BBB+'