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Subsequent Events (Unaudited)	6 Months Ended
Subsequent Events (Unaudited)	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS FCX evaluated events after June 30, 2018, and through the date the consolidated financial statements were issued, and determined any events or transactions occurring during this period that would require recognition or disclosure are appropriately addressed in these consolidated financial statements.