Cargill, the largest privately held corporation in the United States in terms of revenue, has revealed that it has agreed to purchase the global chocolate business of the food processing and commodities trading firm Archer Daniels Midland (ADM). The transaction is valued at $440 million and includes ADM’s three North American chocolate plants, located in Milwaukee (Wis.), Hazleton (Penn.), and Georgetown (Ontario) as well as three in Europe: Liverpool (UK), …