Johnson & Johnson has split its $3 billion media buying account among Interpublic Group, Omnicom Group, and Aegis Group, with some pieces being handled by independent shop Naked Communications and WPP Group’s JWT, following a four month review. Interpublic’s Universal McCann, where J&J spends about a third of its marketing budget, retained work on J&J’s media account in the US and Canada. Interpublic’s Universal McCann, where J&J spends about a third of its marketing budget, retained work on J&J’s media account in the US and Canada.