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Earnings per Share (Unaudited) Earnings per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Reconciliation of net income (loss) and weighted-average shares of common stock outstanding | Reconciliations of net income and weighted-average shares of common stock outstanding for purposes of calculating basic and diluted net income (loss) per share follow (in millions, except per share amounts):
| Three Months Ended |  | Nine Months Ended |
| September 30, |  | September 30, |
| 2021 |  | 2020 |  | 2021 |  | 2020 |
Net income | $ | 1,723 |  |  | $ | 432 |  |  | $ | 4,007 |  |  | $ | 7 |  |
Net income attributable to noncontrolling interests | (324) |  |  | (103) |  |  | (807) |  |  | (116) |  |
Undistributed earnings allocated to participating securities | (4) |  |  | (3) |  |  | (6) |  |  | (3) |  |
Net income (loss) attributable to common stockholders | $ | 1,395 |  |  | $ | 326 |  |  | $ | 3,194 |  |  | $ | (112) |  |
Basic weighted-average shares of common stock outstanding | 1,469 |  |  | 1,453 |  |  | 1,466 |  |  | 1,453 |  |
Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (RSUs) | 15 |  |  | 8 |  | a | 15 |  |  | — |  | a
Diluted weighted-average shares of common stock outstanding | 1,484 |  |  | 1,461 |  |  | 1,481 |  |  | 1,453 |  |
Basic net income (loss) per share attributable to common stockholders | $ | 0.95 |  |  | $ | 0.22 |  |  | $ | 2.18 |  |  | $ | (0.08) |  |
Diluted net income (loss) per share attributable to common stockholders | $ | 0.94 |  |  | $ | 0.22 |  |  | $ | 2.16 |  |  | $ | (0.08) |  |
a.Excludes approximately 2 million shares in third-quarter 2020 and 13 million shares for the first nine months of 2020 associated with outstanding stock options with exercise prices less than the average market price of FCX’s common stock and RSUs that were anti-dilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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