The Madison parent company of American Family Insurance said Tuesday it is buying Ameriprise Auto & Home, a De Pere-based property-and-casualty insurer, for about $1 billion. American Family Insurance Mutual Holding Co. said the acquisition adds customers, diversifies risk and gets the company deeper into the California market. Ameriprise Auto & Home is a business… Continue reading American Family Acquiring Ameriprise Auto & Home for About $1 Billion