Phillips 66 is an independent refiner with 12 refineries that have a total crude throughput capacity of 2.0 million barrels per day, or mmb/d, after converting its 255 mb/d Alliance refinery to a terminal. The midstream segment comprises extensive transportation and NGL processing assets. It also includes its DCP Midstream joint venture, which holds 45 natural gas processing facilities, 11 NGL fractionation plants, and a natural gas pipeline system with 58,000 miles of pipeline. Its CPChem chemical joint venture operates facilities in the United States and the Middle East and primarily produces olefins and polyolefins.