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Contingencies and Commitments (Unaudited) - Litigation (Details) $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2019 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) case | Mar. 13, 2019 USD ($)
Settled litigation | Louisiana Parishes Coastal Erosion Cases | FCX affiliates |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Pending Claims, Number | case |  |  | 13 |
Litigation settlement, agreed to pay, initial payment | $ 15 |  |  |
Pending litigation | Asbestos contamination in talc-based personal care products |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Legal Fees |  | $ 20 | $ 28 |
Pending litigation | Asbestos contamination in talc-based personal care products | Asbestos contamination | Johnson & Johnson and Cyprus Mines |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, estimate of possible loss |  |  |  | $ 29
Pending litigation | Asbestos contamination in talc-based personal care products | Asbestos contamination | Cyprus Mines |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, estimate of possible loss |  |  |  | $ 2

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