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Consolidated Statement of Equity (Unaudited) - 9 months ended Sep. 30, 2015 - USD ($) shares in Millions, $ in Millions | Total | Total FCX Stockholders' Equity [Member] | Common Stock [Member] | Capital in Excess of Par Value [Member] | Retained Earnings (Accumulated Deficit) [Member] | Accumulated Other Comprehensive Loss [Member] | Common Stock Held in Treasury [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 22,474 | $ 18,287 | $ 117 | $ 22,281 | $ 128 | $ (544) | $ (3,695) | $ 4,187
Balance (in shares) at Dec. 31, 2014 |  |  | 1,167 |  |  |  | 128 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Sale of common stock | $ 999 | 999 | $ 10 | 989 | 0 | 0 | $ 0 | 0
Sale of common stock (in shares) | 98 |  | 98 |  |  |  | 0 |
Exercised and issued stock-based awards | $ 3 | 3 | $ 0 | 3 | 0 | 0 | $ 0 | 0
Exercised and issued stock-based awards (in shares) |  |  | 1 |  |  |  | 0 |
Stock-based compensation | 77 | 70 | $ 0 | 70 | 0 | 0 | $ 0 | 7
Reserve of tax benefit for stock-based awards | (4) | (4) | 0 | (4) | 0 | 0 | 0 | 0
Tender of shares for stock-based awards | (7) | (7) | $ 0 | 0 | 0 | 0 | $ (7) | 0
Tender of shares for stock-based awards (in shares) |  |  | 0 |  |  |  | 0 |
Dividends on common stock | (278) | (278) | $ 0 | 0 | (278) | 0 | $ 0 | 0
Dividends to noncontrolling interests | (68) | 0 | 0 | 0 | 0 | 0 | 0 | (68)
Noncontrolling interests' share of contributed capital in subsidiary | (1) | (4) | 0 | (4) | 0 | 0 | 0 | 3
Net loss attributable to common stockholders | (8,155) | (8,155) | 0 | 0 | (8,155) | 0 | 0 | 0
Net income attributable to noncontrolling interests | 129 | 0 | 0 | 0 | 0 | 0 | 0 | 129
Other comprehensive income | 36 | 35 | 0 | 0 | 0 | 35 | 0 | 1
Balance at Sep. 30, 2015 | $ 15,205 | $ 10,946 | $ 127 | $ 23,335 | $ (8,305) | $ (509) | $ (3,702) | $ 4,259
Balance (in shares) at Sep. 30, 2015 |  |  | 1,266 |  |  |  | 128 |

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