The Evolving Giant: Walmart CEO Doug McMillon with Becky Quick at CNBC Evolve Summit

The decline of retail has been well documented, but someone forgot to tell Doug McMillon. In his five years as CEO of the nation's largest private employer, Walmart has beat the S&P and is weathering the onslaught from Amazon. The former teenage summer associate turned CEO discusses how the company is continually evolving, with investments in new technologies, customer service, acquisitions and more at the CNBC Evolve Summit in Los Angeles.