On arrival at CDG, it's really important to find out which gate you will be departing to Houston from. We know now it's terminal 2E but you will need to find out on the date if it's gates K, L or M.

You will get on the transfer bus at 2C/2A. The next stop is 2D. Then you will stop at 2F and 2E-gates L. Next stop is 2E-gates-M and final stop is 2E-gates-K.

Going all the way to 2E-gates K would be a mistake is you depart from L or M.