Norfolk Southern Corp. said it sold its trucking company, North American Van Lines, to New York investment firm Clayton, Dubilier & Rice Inc. for $200 million. The Norfolk, Va.-based railroad company bought North American Van Lines from PepsiCo Inc. for $315 million in 1985 and has liquidated and sold parts of the trucking unit since then. . . . Canada's Newcourt Credit Group completed its $1.61-billion acquisition of rival AT&T; Capital Corp., making it the world's largest publicly traded commercial finance company. . . . WorldCom Inc. said it was planning a major push into Japan's telecommunications market, in a move likely to heat up competition and spark mergers in an already unsettled sector.