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Consolidated Statement of Equity (Unaudited) - 3 months ended Mar. 31, 2016 - 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, 2015 | $ 12,044 | $ 7,828 | $ 137 | $ 24,283 | $ (12,387) | $ (503) | $ (3,702) | $ 4,216
Balance (in shares) at Dec. 31, 2015 |  |  | 1,374 |  |  |  | 128 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Sale of common stock | 32 | 32 | $ 1 | 31 | 0 | 0 | $ 0 | 0
Sale of common stock (in shares) |  |  | 5 |  |  |  | 0 |
Exercised and issued stock-based awards | 0 | 0 | $ 0 | 0 | 0 | 0 | $ 0 | 0
Exercised and issued stock-based awards (in shares) |  |  | 2 |  |  |  | 0 |
Stock-based compensation | 23 | 23 | $ 0 | 23 | 0 | 0 | $ 0 | 0
Reserve on tax benefit for stock-based awards | (3) | (3) | 0 | (3) | 0 | 0 | 0 | 0
Tender of shares for stock-based awards | (4) | (4) | $ 0 | 0 | 0 | 0 | $ (4) | 0
Tender of shares for stock-based awards (in shares) |  |  | 0 |  |  |  | 1 |
Dividends on common stock | 1 | 1 | $ 0 | 0 | 1 | 0 | $ 0 | 0
Dividends to noncontrolling interests | (10) | 0 | 0 | 0 | 0 | 0 | 0 | (10)
Noncontrolling interests' share of contributed capital in subsidiary | 0 | (1) | 0 | (1) | 0 | 0 | 0 | 1
Net loss attributable to common stockholders | (4,184) | (4,184) | 0 | 0 | (4,184) | 0 | 0 | 0
Net income attributable to noncontrolling interests, including discontinued operations | 72 | 0 | 0 | 0 | 0 | 0 | 0 | 72
Other comprehensive loss | (1) | 0 | 0 | 0 | 0 | 0 | 0 | (1)
Balance at Mar. 31, 2016 | $ 7,970 | $ 3,692 | $ 138 | $ 24,333 | $ (16,570) | $ (503) | $ (3,706) | $ 4,278
Balance (in shares) at Mar. 31, 2016 |  |  | 1,381 |  |  |  | 129 |

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