Copyright arises automatically when an original work is created, protecting the expression of ideas but not the ideas themselves. Copyright protects original literary works, dramatic works, musical works, artistic works, sound recordings, films, broadcasts and typographical arrangements. As a general rule, the copyright owner is the creator of the work, though an employer owns copyright over works created by employees in the course of their employment. Copyright owners have both economic rights over how a work is used and moral rights to be credited as the author and object to derogatory treatment of a work. Infringement occurs when a substantial part of a copyrighted work is reproduced, distributed, performed, or communicated without permission.