The leaders of the Group of 20, who represent 19 of the world's largest national economies plus the European Union, have called for the world to coalesce around a single set of financial reporting standards by June 2011, and IFRS is undergoing a series of changes to become that single set of standards. While the acceptance of IFRS is widespread, it is not yet universal. However, the trend is continuing, with more countries, such as Brazil, Canada, and Korea, adopting IFRS in the next few years. The two most recent and notable actions in line with this trend came from the United States and Japan, which are home to 40 percent of the Global Fortune 500 companies. Japan's Financial Services Authority decided in December 2009 to permit voluntary use of IFRS, while the Securities and Exchange Commission in the United States in February published a plan for making a decision on the adoption of IFRS in 2011. In light of the changing IFRS landscape, clients globally, as well as Deloitte member firm professionals in all functions and virtually all geographies, are likely to be affected by IFRS over the next few years.