More than just a miner, Freeport-McMoRan (FCX, formerly Freeport-McMoRan Copper & Gold) has oil and gas fields as well as copper and precious metal mines. In 2015 FCX's proven and probable reserves totaled 99.5 billion pounds of copper, 27.1 million ounces of gold, and 282.9 million ounces of silver. Subsidiary PT Freeport Indonesia (PT-FI), operates the vast Grasberg gold, copper, and silver mine in Indonesia. FCX is also engaged in smelting and refining via PT-FI's 25% stake in PT Smelting, a copper smelter in Indonesia. In 2015 the company reported estimated proved oil and natural gas reserves of 252 million barrels of oil equivalent.