NEW YORK--(BUSINESS WIRE)--Fitch Ratings has downgraded DCP Midstream LLC's (DCP) Issuer Default Rating (IDR) and senior unsecured ratings to 'BB+' from 'BBB-' following the announcement that its owners will contribute $3 billion in equity. Additionally, Fitch has assigned a senior secured rating of 'BB+/RR4' to DCP, assigned an 'RR4' to DCP's senior unsecured rating and downgraded DCP's short-term IDR and commercial paper rating to 'B' from 'F3' and also withdrawn the short-term IDR and commer