Holcim Ltd (HOLN.VX), a Swiss company, and Lafarge S.A. (LAFP.PA), which is based in Paris, on Monday won U.S. antitrust approval to merge after they agreed to divest assets, the Federal Trade Commission. The companies won approval for the deal from European Union antitrust enforcers in December. In the United States, the two companies agreed that Lafarge would sell a cement plant and quarry in Iowa as well as terminals and distribution centers in Minnesota, Wisconsin, Tennessee and Louisiana.