CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
FCX stockholders’ equity:
Common stock, par value per share (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares issued	1,165	1,073
Common stock held in treasury, shares	127	124
Oil and gas properties, net - full cost method:
Accumulated amortization	$ 1,357	$ 0