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Financial Instruments - Unrealized gains losses (Details) oz in Thousands, lb in Millions, $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 oz lb | Sep. 30, 2023 USD ($) $ / lb $ / oz $ / lb | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) lb $ / lb $ / oz $ / lb | Sep. 30, 2022 USD ($)
Not Designated as Hedging Instrument | Amounts recorded in Sales |  |  |  |  |
Realized gains (losses): |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ (40) | $ (306) | $ 43 | $ (819)
Commodity Contract |  |  |  |  |
Unrealized gains (losses): |  |  |  |  |
Derivative financial instruments |  | 2 | 17 | (9) | (61)
Hedged item – firm sales commitments |  | (2) | (17) | 9 | 61
Realized gains (losses): |  |  |  |  |
Matured derivative financial instruments |  | $ (4) | (50) | $ (1) | (48)
Commodity Contract | Designated as Hedging Instrument [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  | 85 |
Derivative, Average Forward Price | $ / lb |  | 3.85 |  | 3.85 |
Copper Forward Contracts | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb |  |  |  | 19 |
Derivative, Average Forward Price | $ / lb |  | 3.77 |  | 3.77 |
Realized gains (losses): |  |  |  |  |
Matured derivative financial instruments |  | $ (1) | 5 | $ (3) | 31
Copper | Not Designated as Hedging Instrument |  |  |  |  |
Realized gains (losses): |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ (30) | (272) | $ 31 | (774)
Copper | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 553 |  |  |  |
Derivative, Average Forward Price | $ / lb |  | 3.78 |  | 3.78 |
Realized gains (losses): |  |  |  |  |
Derivative Average Market Price | $ / lb |  | 3.75 |  | 3.75 |
Copper | Long [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | lb | 165 |  |  |  |
Derivative, Average Forward Price | $ / lb |  | 3.80 |  | 3.80 |
Realized gains (losses): |  |  |  |  |
Derivative Average Market Price | $ / lb |  | 3.75 |  | 3.75 |
Gold | Short [Member] | Embedded Derivative Financial Instruments | Not Designated as Hedging Instrument |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | oz | 209 |  |  |  |
Derivative, Average Forward Price | $ / oz |  | 1,925 |  | 1,925 |
Realized gains (losses): |  |  |  |  |
Derivative Average Market Price | $ / oz |  | 1,884 |  | 1,884 |
gold and other | Not Designated as Hedging Instrument |  |  |  |  |
Realized gains (losses): |  |  |  |  |
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net |  | $ (10) | $ (34) | $ 12 | $ (45)

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