CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed the Issuer Default Ratings (IDRs) of Delphi Automotive PLC (DLPH) and its Delphi Corporation (Delphi) subsidiary at 'BBB'. The action follows yesterday's announcement that DLPH will acquire U.K.-based HellermannTyton Group PLC (HTY). Fitch has also affirmed DLPH's senior unsecured notes and Delphi's unsecured revolving credit facility, unsecured term loan, and senior unsecured notes ratings at 'BBB'. A complete list of the ratings is provided