Wouldn't you do the same as a wide beam? It's much better to make the footing thick enough you don't need shear reinforcement.
In the event you do decide to go with shear reinforcement, be sure to look up some research on shear reinforcement in wide beams. There are some additional effects you need to know about that are not addressed in the ACI code as of yet, to my knowledge. The BS may have this information, I don't know.