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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | A summary of changes in the balances of each component of accumulated other comprehensive loss, net of tax, follows:
| Defined Benefit Plans |  | Unrealized Losses on Securities |  | Translation Adjustment |  | Total
Balance at January 1, 2016 | $ | (507 | ) |  | $ | (6 | ) |  | $ | 10 |  |  | $ | (503 | )
Amounts arising during the period a,b | (91 | ) |  | 2 |  |  | — |  |  | (89 | )
Amounts reclassified c | 44 |  |  | — |  |  | — |  |  | 44 |
Balance at December 31, 2016 | (554 | ) |  | (4 | ) |  | 10 |  |  | (548 | )
Amounts arising during the period a,b | 7 |  |  | 1 |  |  | — |  |  | 8 |
Amounts reclassified c | 53 |  |  | — |  |  | — |  |  | 53 |
Balance at December 31, 2017 | (494 | ) |  | (3 | ) |  | 10 |  |  | (487 | )
Adoption of new accounting standard for reclassification of income taxes (refer to Note 1) | (79 | ) |  | — |  |  | — |  |  | (79 | )
Amounts arising during the period a,b | (84 | ) |  | — |  |  | — |  |  | (84 | )
Amounts reclassified c | 48 |  |  | 3 |  |  | — |  |  | 51 |
Sale of interest in PT-FI (refer to Note 2) | (6 | ) |  | — |  |  | — |  |  | (6 | )
Balance at December 31, 2018 | $ | (615 | ) |  | $ | — |  |  | $ | 10 |  |  | $ | (605 | )
a. | Includes net actuarial (losses) gains, net of noncontrolling interest, totaling $(79) million for 2016, $52 million for 2017 and $(87) million for 2018.
b. | Includes tax provision totaling $11 million for 2016, $45 million for 2017 and $4 million for 2018.
c. | Includes amortization primarily related to actuarial losses, net of taxes of $4 million for 2016, $5 million for 2017 and none for 2018.
Compensation costs charged against earnings | Compensation cost charged against earnings for stock-based awards for the years ended December 31 follows:
| 2018 |  | 2017 |  | 2016 |
Selling, general and administrative expenses | $ | 62 |  |  | $ | 55 |  |  | $ | 69 |  |
Production and delivery | 12 |  |  | 16 |  |  | 16 |  |
Capitalized costs | — |  |  | — |  |  | 4 |  |
Total stock-based compensation | 74 |  |  | 71 |  |  | 89 |  |
Less capitalized costs | — |  |  | — |  |  | (4 | ) |
Tax benefit and noncontrolling interests’ share | (4 | ) | a | (4 | ) | a | (3 | ) | a
Impact on net income (loss) from continuing operations | $ | 70 |  |  | $ | 67 |  |  | $ | 82 |  |
a. Charges in the U.S. are not expected to generate a future tax benefit.
Summary of stock options and SARs outstanding and changes during the period | A summary of stock options outstanding as of December 31, 2018, and activity during the year ended December 31, 2018, follows:
| Number of Options |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value |
Balance at January 1 | 48,014,688 |  |  | $ | 28.63 |  |  |  |  |  |
Granted | 3,315,000 |  |  | 18.74 |  |  |  |  |  |
Exercised | (801,706 | ) |  | 10.05 |  |  |  |  |  |
Expired/Forfeited | (3,721,618 | ) |  | 39.26 |  |  |  |  |  |
Balance at December 31 | 46,806,364 |  |  | 27.40 |  |  | 4.5 |  | $ | 38 |  |
Vested and exercisable at December 31 | 39,919,885 |  |  | 29.80 |  |  | 3.8 |  | $ | 26 |  |
Weighted average assumptions used to value stock option awards | Information related to stock options during the years ended December 31 follows:
| 2018 |  | 2017 |  | 2016 |
Weighted-average assumptions used to value stock option awards: |  |  |  |  |  |
Expected volatility | 46.1 | % |  | 51.4 | % |  | 71.6 | % |
Expected life of options (in years) | 5.92 |  |  | 5.70 |  |  | 5.34 |  |
Expected dividend rate | 1.2 | % |  | — |  |  | — |  |
Risk-free interest rate | 2.6 | % |  | 2.0 | % |  | 1.3 | % |
Weighted-average grant-date fair value (per share) | $ | 7.84 |  |  | $ | 7.61 |  |  | $ | 2.64 |  |
Intrinsic value of options exercised | $ | 7 |  |  | $ | 5 |  |  | $ | — |  | a
Fair value of options vested | $ | 24 |  |  | $ | 25 |  |  | $ | 43 |  |
a. Rounds to less than $1 million.
Summary Of Outstanding Stock-settled RSUs and PSUs | A summary of outstanding stock-settled RSUs and PSUs as of December 31, 2018, and activity during the year ended December 31, 2018, follows:
| Number of Awards |  | Weighted-Average Grant-Date Fair Value Per Award |  | Aggregate Intrinsic Value
Balance at January 1 | 5,206,624 |  |  | $ | 18.48 |  |  |
Granted | 2,127,785 |  | a | 19.11 |  |  |
Vested | (753,806 | ) |  | 15.53 |  |  |
Forfeited | (775,966 | ) |  | 11.91 |  |  |
Balance at December 31 | 5,804,637 |  |  | 19.97 |  |  | $ | 60 |
Summary of Outstanding Cash-Settled RSUs and PSUs | A summary of outstanding cash-settled RSUs and PSUs as of December 31, 2018, and activity during the year ended December 31, 2018, follows:
| Number of Awards |  | Weighted-Average Grant-Date Fair Value Per Award |  | Aggregate Intrinsic Value
Balance at January 1 | 1,307,235 |  |  | $ | 13.32 |  |  |
Granted | 870,312 |  |  | 17.91 |  |  |
Vested | (666,975 | ) |  | 14.12 |  |  |
Forfeited | (23,706 | ) |  | 15.92 |  |  |
Balance at December 31 | 1,486,866 |  |  | 15.61 |  |  | $ | 15 |
Schedule of amounts related to exercises of stock options and stock appreciation rights and the vesting of restricted stock units and restricted stock awards | The following table includes amounts related to exercises of stock options and vesting of RSUs during the years ended December 31:
| 2018 |  | 2017 |  | 2016 |
FCX shares tendered to pay the exercise price |  |  |  |  |  |
and/or the minimum required taxes a | 195,322 |  |  | 1,041,937 |  |  | 906,120 |  |
Cash received from stock option exercises | $ | 8 |  |  | $ | 5 |  |  | $ | — |  | b
Actual tax benefit realized for tax deductions | $ | 3 |  |  | $ | 1 |  |  | $ | — |  | b
Amounts FCX paid for employee taxes | $ | 4 |  |  | $ | 15 |  |  | $ | 6 |  |
a. | Under terms of the related plans, upon exercise of stock options and vesting of stock-settled RSUs, employees may tender FCX shares to pay the exercise price and/or the minimum required taxes.
b. | Rounds to less than $1 million.

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