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Financial Instruments (Unrealized gains losses) (Details) oz in Thousands, lb in Millions, $ in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 31, 2022 oz lb $ / oz $ / lb $ / lb | Mar. 31, 2022 USD ($) $ / oz $ / lb $ / lb | Mar. 31, 2021 USD ($)
Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |
Realized gains (losses): |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ 240 | $ 179
Commodity Contract |  |  |
Unrealized gains (losses): |  |  |
Derivative financial instruments |  | 12 | 3
Hedged item – firm sales commitments |  | (12) | (3)
Realized gains (losses): |  |  |
Matured derivative financial instruments |  | $ 14 | 24
Commodity Contract | Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 84 |  |
Derivative, Average Forward Price | $ / lb | 4.47 | 4.47 |
Copper Forward Contracts | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 4 |  |
Derivative, Average Forward Price | $ / lb | 4.60 | 4.60 |
Copper Forward Contracts | Not Designated as Hedging Instrument [Member] | Amounts recorded in Cost of Sales |  |  |
Realized gains (losses): |  |  |
Matured derivative financial instruments |  | $ 4 | (8)
Copper | Not Designated as Hedging Instrument [Member] | Amounts recorded in Sales [Member] |  |  |
Realized gains (losses): |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ 218 | 207
Copper | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 753 |  |
Derivative, Average Forward Price | $ / lb | 4.49 | 4.49 |
Realized gains (losses): |  |  |
Derivative Average Market Price | $ / lb | 4.71 | 4.71 |
Copper | Long [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 65 |  |
Derivative, Average Forward Price | $ / lb | 4.43 | 4.43 |
Realized gains (losses): |  |  |
Derivative Average Market Price | $ / lb | 4.71 | 4.71 |
Gold | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 206 |  |
Derivative, Average Forward Price | $ / oz | 1,925 | 1,925 |
Realized gains (losses): |  |  |
Derivative Average Market Price | $ / oz | 1,936 | 1,936 |
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 |  | $ 22 | $ (28)

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