CHICAGO--(BUSINESS WIRE)--Fitch Ratings has assigned an 'A' rating to AT&T Inc.'s (AT&T) debt issue in Taiwan. AT&T's Issuer Default rating (IDR) is 'A'. The company's IDR and debt securities remain on Rating Watch Negative, where they were placed on May 19 upon the announcement of the acquisition of DIRECTV. DIRECTV's wholly-owned indirect subsidiary, DIRECTV Holdings LLC, has an IDR of 'BBB-'. Proceeds from this offering are expected to be used for general corporate purposes, incl