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Financial Instruments - Unrealized gains losses (Details) oz in Thousands, lb in Millions, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 oz lb | Jun. 30, 2024 USD ($) $ / lb $ / oz $ / lb | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) lb $ / lb $ / oz $ / lb | Jun. 30, 2023 USD ($)
Commodity Contract |  |  |  |  |
Unrealized gains (losses): |  |  |  |  |
Derivative financial instruments |  | $ 1 | $ (25) | $ 10 | $ (11)
Hedged item – firm sales commitments |  | (1) | 25 | (10) | 11
Realized gains (losses): |  |  |  |  |
Matured derivative financial instruments |  | 28 | (5) | 29 | 3
Matured derivative financial instruments |  | $ 28 | (5) | $ 29 | 3
Commodity Contract | Designated as Hedging Instrument [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  | 95 |
Derivative, Average Forward Price | $ / lb |  | 4.26 |  | 4.26 |
Forward Contracts | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  | 44 |
Derivative, Average Forward Price | $ / lb |  | 4.38 |  | 4.38 |
Realized gains (losses): |  |  |  |  |
Matured derivative financial instruments |  | $ (17) | 1 | $ (26) | (1)
Matured derivative financial instruments |  | (17) | 1 | (26) | (1)
Copper | Not Designated as Hedging Instrument |  |  |  |  |
Realized gains (losses): |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ 181 | (169) | $ 247 | 61
Copper | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 371 |  |  |  |
Derivative, Average Forward Price | $ / lb |  | 4.26 |  | 4.26 |
Realized gains (losses): |  |  |  |  |
Derivative Average Market Price | $ / lb |  | 4.33 |  | 4.33 |
Copper | Long [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 115 |  |  |  |
Derivative, Average Forward Price | $ / lb |  | 4.39 |  | 4.39 |
Realized gains (losses): |  |  |  |  |
Derivative Average Market Price | $ / lb |  | 4.33 |  | 4.33 |
Gold | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 93 |  |  |  |
Derivative, Average Forward Price | $ / oz |  | 2,333 |  | 2,333 |
Realized gains (losses): |  |  |  |  |
Derivative Average Market Price | $ / oz |  | 2,344 |  | 2,344 |
gold and other | Not Designated as Hedging Instrument |  |  |  |  |
Realized gains (losses): |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ 45 | $ (21) | $ 89 | $ 22

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