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Earnings per Share (Unaudited) Earnings per Share (Tables) | 3 Months Ended
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Mar. 31, 2019
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 per share follow (in millions, except per share amounts):
| Three Months Ended |
| March 31, |
| 2019 |  | 2018 |
Net income from continuing operations | $ | 75 |  |  | $ | 828 |  |
Net income from continuing operations attributable to noncontrolling interests | (45 | ) |  | (125 | ) |
Undistributed earnings allocated to participating securities | (3 | ) |  | (4 | ) |
Net income from continuing operations attributable to common stockholders | 27 |  |  | 699 |  |
Net income (loss) from discontinued operations attributable to common stockholders | 1 |  |  | (11 | ) |
Net income attributable to common stockholders | $ | 28 |  |  | $ | 688 |  |
Basic weighted-average shares of common stock outstanding | 1,451 |  |  | 1,449 |  |
Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units a | 6 |  |  | 9 |  |
Diluted weighted-average shares of common stock outstanding | 1,457 |  |  | 1,458 |  |
Basic and diluted net income (loss) per share attributable to common stockholders: |  |  |  |
Continuing operations | $ | 0.02 |  |  | $ | 0.48 |  |
Discontinued operations | — |  |  | (0.01 | ) |
| $ | 0.02 |  |  | $ | 0.47 |  |
a. Excludes approximately 3 million shares of common stock in first-quarter 2019 and 4 million in first-quarter 2018 associated with outstanding stock options with exercise prices less than the average market price of FCX’s common stock 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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