Walmart announced on Friday that CEO Doug McMillon will retire in January after more than a decade leading the retailer.  He will be succeeded by Walmart U.S. CEO John Furner effective Feb. 1. Furner will also join the company’s board of directors on the same date.McMillon will remain on the company's board until the next annual shareholders meeting in June to assist in ensuring a smooth leadership transition. "Serving as Walmart’s CEO has been a great honor and I’m thankful to our Board and the Walton fami ...