I've never been to this shopping area very near CDG; however, if I will probably visit it if I ever have a delayed flight or need something to do for a couple of hours. It is the Usines Center at Paris Nord 2. There are over 120 shops (including outlet stores and an Ikea), restaurants, and rest areas (according to the web site). You can get there by taking the RER; less than ten minutes. It is open seven days a week from 10:00 (week ends) or 11:00 (week days) to 7:00 (week days or 8:00 (week ends).
The web site is
www.usinescenter.biz/24-9117-English-version.php
Has anyone visited?