This statistic depicts the employment of Big-Box and department stores in the U.S. retail industry from 2006 to 2015 and provides a forecast until 2020. In 2015, employment amounted to 918,916 employees. A big-box store (also supercenter, superstore, or megastore) is a physically large retail establishment, usually part of a chain. The term sometimes also refers, by extension, to the company that operates the store. The store may sell general dry goods, in which case it is a department store, or may be limited to a particular specialty or may also sell groceries, in which case some countries (mostly in Europe) use the term hypermarket. Walmart is a the most successful big-box chain in the United States. In 2017, the company's global net sales amounted to about 481.32 billion U.S. dollars.