Todd Spangler NY Digital EditorIAC, the digital media holding company headed by Barry Diller, is the leading bidder for Meredith’s magazine and digital businesses, in a potential deal valued at more than $2.5 billion, the Wall Street Journal reported late Thursday.Meredith’s brands, focused on women-skewing audiences, include People, EW, InStyle, Shape, Food & Wine, Better Homes & Gardens, Allrecipes and Parents.