SRL for [refund]: Commonwealth Edison Co. was ordered to [refund] about $ 250 million to its current and former ratepayers for illegal rates collected for cost overruns on a nuclear power plant .
ARG-0: Commonwealth Edison Co. | ARG-1: about $ 250 million | ARG-2: to its current and former ratepayers | ARG-M-CAU: for illegal rates collected for cost overruns on a nuclear power plant