But Karmazin had bigger plans : in 2000 , he sold CBS to Sumner Redstone and his company , Viacom , in a deal valued at $ 37 billion .
Sumner Redstone
Viacom
/business/person/company
Sumner Redstone
Viacom
/business/company_shareholder/major_shareholder_of
Viacom
Sumner Redstone
/business/company/major_shareholders
Sumner Redstone
CBS
/business/person/company
ORGANIZATION
CBS
PERSON
Sumner Redstone
ORGANIZATION
Viacom