Contingencies and Commitments (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Asset Retirement Obligation Disclosure [Text Block]

A summary of changes in FCX's AROs (included in reclamation and environmental obligations in the condensed consolidated balance sheet) for the six months ended June 30, 2013 follows (in millions):

Balance at December 31, 2012	$	1,146
Liabilities assumed in the acquisitions of PXP and MMRa	1,024
Liabilities incurred	9
Revisions to cash flow estimates	15
Accretion expense	33
Spending, including oil and gas settlements	(28		)
Balance at June 30, 2013	2,199
Less current portion	(130		)
Long-term portion	$	2,069

a. The fair value of AROs assumed in the acquisitions of PXP and MMR ($741 million and $283 million, respectively) were estimated based on projected cash flows, an estimated long-term annual inflation rate of 2.5 percent, and discount rates based on FCX's estimated credit-adjusted, risk-free interest rates ranging from 1.3 percent to 6.3 percent.