New Accounting Standard (Unaudited)

6 Months Ended

Jun. 30, 2013

New Accounting Standards [Abstract]

New Accounting Standard

NEW ACCOUNTING STANDARD

In December 2011, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) that requires companies to disclose information regarding offsetting and other arrangements for derivatives and other financial instruments. Additionally, in January 2013, FASB issued an ASU that limited the scope of the balance sheet offsetting disclosures to derivatives, repurchase agreements and securities lending transactions to the extent that they are (i) offset in the financial statements or (ii) subject to an enforceable master netting arrangement or similar arrangement. FCX adopted this guidance effective January 1, 2013.