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v3.20.1

Financial Instruments (Unrealized gains losses) (Details) oz in Thousands, lb in Millions, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2020 lb $ / lb | Mar. 31, 2020 USD ($) lb oz $ / lb $ / lb $ / oz | Mar. 31, 2019 USD ($)
Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |
Realized gains (losses): |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net | $ |  | $ (231) | $ 120
Commodity Contract [Member] |  |  |
Unrealized gains (losses): |  |  |
Derivative financial instruments | $ |  | (33) | 18
Hedged item – firm sales commitments | $ |  | 33 | (18)
Realized gains (losses): |  |  |
Matured derivative financial instruments | $ |  | $ (9) | 2
Commodity Contract [Member] | Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  | 84 |
Derivative, Average Forward Price | $ / lb |  | 2.56 |
Copper Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  | 34 |
Derivative, Average Forward Price | $ / lb |  | 2.35 |
Copper Forward Contracts [Member] | Not Designated as Hedging Instrument [Member] | Amounts recorded in Cost of Sales |  |  |
Realized gains (losses): |  |  |
Matured derivative financial instruments | $ |  | $ 24 | 1
Copper | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |
Realized gains (losses): |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net | $ |  | $ (238) | 122
Copper | Short [Member] | Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  | 333 |
Derivative, Average Forward Price | $ / lb |  | 2.59 |
Realized gains (losses): |  |  |
Derivative Average Market Price | $ / lb |  | 2.24 |
Copper | Long [Member] | Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  | 87 |
Derivative, Average Forward Price | $ / lb |  | 2.58 |
Realized gains (losses): |  |  |
Derivative Average Market Price | $ / lb |  | 2.24 |
Gold | Short [Member] | Embedded Derivative Financial Instruments [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | oz |  | 92 |
Derivative, Average Forward Price | $ / oz |  | 1,601 |
Realized gains (losses): |  |  |
Derivative Average Market Price | $ / oz |  | 1,614 |
gold and other | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |
Realized gains (losses): |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net | $ |  | $ 7 | $ (2)
Subsequent event | Copper Forward Contracts [Member] | Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 150 |  |
Derivative, Average Forward Price | $ / lb | 2.34 |  |

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