With a presence in 206 countries, drafting a social media policy must be a challenge for a company like Coca-Cola.
By the way, Coca-Cola does not call it ‘a policy’ but ‘social media principles’ and recently replaced older guidelines by new ones that fit on 3 pages.
There are principles about what the company as a whole is committed to do in the social media space (transparency, disclosure etc.), principles for official spokes persons who have to go through a social media certification program and principles for employees who are not official spokes people.