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Earnings per Share (Unaudited) Earnings per Share (Notes) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE FCX calculates its basic net income per share of common stock under the two-class method and calculates its diluted net income per share of common stock using the more dilutive of the two-class method or the treasury-stock method. Basic net income per share of common stock was computed by dividing net income attributable to common stockholders by the weighted-average shares of common stock outstanding during the period. Diluted net income per share of common stock was calculated by including the basic weighted-average shares of common stock outstanding adjusted for the effects of all potential dilutive shares of common stock, unless their effect would be anti-dilutive. 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.
Outstanding stock options with exercise prices greater than the average market price of FCX’s common stock during the period are excluded from the computation of diluted net income per share of common stock. Stock options for 39 million shares of common stock in first-quarter 2019 and 33 million shares of common stock in first-quarter 2018 were excluded.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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