 This merger deal came just one day after The Walt Disney Company announced that it would acquire Capital Cities/ABC, parent company of rival ABC.Viacom bought Westinghouse/CBS for $36 billion in September 1999, which created duopolies in several markets between O&Os of CBS and UPN.Viacom and CBS split in December 2005, with the successor CBS Corporation (a name previously used by the entity that owned CBS's properties under Westinghouse) retaining the company's broadcasting assets, including UPN.