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OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Schedule of Disclosures) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) Rp / $ | Dec. 31, 2021 USD ($) Rp / $ | Dec. 31, 2020 USD ($)
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected and accumulated benefit obligation | $ 1,831 | $ 2,476 |
Fair value of plan assets | 1,422 | 1,988 |
Pension Plan | UNITED STATES |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | 2,553 | 2,722 |
Service cost | 15 | 12 | $ 37
Interest cost | 71 | 66 | 77
Actuarial gains | (623) | (117) |
Foreign exchange gains | (3) | (1) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 129 | 129 |
Benefits obligation at end of year | 1,884 | 2,553 | 2,722
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year | 2,071 | 1,946 |
Actual return on plan assets | (509) | 150 |
Employer contributions | 52 | 105 |
Foreign exchange losses | (2) | (1) |
Benefits and administrative expenses paid | (129) | (129) |
Fair value of plan assets at end of year | 1,483 | 2,071 | $ 1,946
Funded status at end of year | (401) | (482) |
Accumulated benefit obligation | $ 1,882 | $ 2,551 |
Weighted-average assumptions used to determine benefit obligations [Abstract] |  |  |
Discount rate | 5.41% | 2.85% | 2.50%
Balance sheet classification of funded status: |  |  |
Other assets | $ 8 | $ 6 |
Accounts payable and accrued liabilities | (4) | (4) |
Other liabilities | (405) | (484) |
Total | (401) | $ (482) |
Estimated future employer contributions in next fiscal year | $ 60 |  |
Weighted-average assumptions used to determine benefit obligations [Abstract] |  |  |
Discount rate | 2.85% | 2.50% | 2.98%
Expected return on plan assets | 3.00% | 5.25% | 6.25%
Rate of compensation increase |  |  | 3.25%
Components of net periodic benefit (income) cost and other amounts recognized in other comprehensive income [Abstract] |  |  |
Service cost | $ 15 | $ 12 | $ 37
Interest cost | 71 | 66 | 77
Expected return on plan assets | (62) | (98) | (105)
Amortization of net actuarial losses | 15 | 25 | 45
Curtailment loss | 0 | 0 | 4
Net periodic benefit cost | 39 | 5 | 58
Pension Plan | Foreign Plan |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at beginning of year | 237 | 238 |
Service cost | 12 | 13 | 11
Interest cost | 14 | 14 | 14
Actuarial gains | (2) | (3) |
Foreign exchange gains | (22) | (3) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 26 | 20 |
Benefits obligation at end of year | 215 | 237 | 238
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year | 240 | 251 |
Actual return on plan assets | 10 | 8 |
Employer contributions | 2 | 4 |
Foreign exchange losses | (21) | (3) |
Benefits and administrative expenses paid | (26) | (20) |
Fair value of plan assets at end of year | 205 | 240 | $ 251
Funded status at end of year | (10) | 3 |
Accumulated benefit obligation | $ 176 | $ 194 |
Weighted-average assumptions used to determine benefit obligations [Abstract] |  |  |
Discount rate | 7.00% | 6.50% |
Rate of compensation increase | 4.00% | 4.00% |
Balance sheet classification of funded status: |  |  |
Other assets | $ 0 | $ 3 |
Accounts payable and accrued liabilities | 0 | 0 |
Other liabilities | (10) | 0 |
Total | (10) | $ 3 |
Estimated future employer contributions in next fiscal year | $ 11 |  |
Foreign currency exchange rate | Rp / $ | 15,652 | 14,198 |
Weighted-average assumptions used to determine benefit obligations [Abstract] |  |  |
Discount rate | 6.50% | 6.25% | 7.25%
Expected return on plan assets | 7.00% | 7.75% | 7.75%
Rate of compensation increase | 4.00% | 4.00% | 4.00%
Components of net periodic benefit (income) cost and other amounts recognized in other comprehensive income [Abstract] |  |  |
Service cost | $ 12 | $ 13 | $ 11
Interest cost | 14 | 14 | 14
Expected return on plan assets | (15) | (19) | (19)
Amortization of prior service cost | 1 | 1 | 2
Amortization of net actuarial losses | (1) | (1) | (3)
Special termination benefit | 2 | 0 | 0
Net periodic benefit cost | 13 | 8 | $ 5
Pension Plan | FCX | UNITED STATES |  |  |
Change in benefit obligation: |  |  |
Special termination benefits and plan amendments | 0 | 0 |
Pension Plan | PT Freeport Indonesia, Subsidiary | Foreign Plan |  |  |
Change in benefit obligation: |  |  |
Special termination benefits and plan amendments | $ 2 | $ (2) |

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