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Consolidated Statement of Equity (Unaudited) (USD $)
In Millions, unless otherwise specified
Total
Total FCX Stockholders' Equity [Member]
Common Stock [Member]
Capital in Excess of Par Value [Member]
Retained Earnings (Deficit) [Member]
Accumulated Other Comprehensive Loss [Member]
Common Stock Held in Treasury [Member]
Noncontrolling Interest [Member]
Balance at Dec. 31, 2011 $ 18,553 $ 15,642 $ 107 $ 19,007 $ 546 $ (465) $ (3,553) $ 2,911
Balance (in shares) at Dec. 31, 2011     1,071       123  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Exercised and issued stock-based awards 13 13 0 13 0 0 0 0
Exercised and issued stock-based awards (in shares)     2       0  
Stock-based compensation 54 54 0 54 0 0 0 0
Tax benefit for stock-based awards 5 5 0 5 0 0 0 0
Tender of shares for stock-based awards (16) (16) 0 6 0 0 (22) 0
Tender of shares for stock-based awards (in shares)     0       1  
Dividends on common stock (594) (594) 0 0 (594) 0 0 0
Dividends to noncontrolling interests (38) 0 0 0 0 0 0 (38)
Change in ownership interest for noncontrolling interests 0 (17) 0 (17) 0 0 0 17
Total comprehensive income 1,913 1,491 0 0 1,474 17 0 422
Balance at Jun. 30, 2012 $ 19,890 $ 16,578 $ 107 $ 19,068 $ 1,426 $ (448) $ (3,575) $ 3,312
Balance (in shares) at Jun. 30, 2012     1,073       124