The International Brotherhood of Teamsters (IBT) is a labor union in the United States and Canada. Formed in 1903 by the merger of several local and regional locals of teamsters, the union now represents a diverse membership of blue-collar and professional workers in both the public and private sectors. The union had approximately 1.3 million members in 2013. Formerly known as the International Brotherhood of Teamsters, Chauffeurs, Warehousemen and Helpers of America, the IBT is a member of the Change to Win Federation and Canadian Labour Congress.