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Derivative Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of effect of derivatives in our consolidated statements of operations | The effect of derivatives in our consolidated statements of operations is shown in the table below.
| Gain (loss) recognized in income
|  |  | Year ended December 31,
| Location |  | 2023 |  | 2022 |  | 2021
|  |  | (in millions)
Natural gas derivatives |  |  |  |  |  |  |
Unrealized net gains (losses) | Cost of sales |  | $ | 39 |  |  | $ | (41) |  |  | $ | (25) |
Realized net (loss) gains | Cost of sales |  | (139) |  |  | 10 |  |  | 1 |
Gain on net settlement of natural gas derivatives due to Winter Storm Uri | Cost of sales |  | — |  |  | — |  |  | 112 |
Net derivative (losses) gains |  |  | $ | (100) |  |  | $ | (31) |  |  | $ | 88 |
Schedule of fair values of derivatives in our consolidated balance sheet | The fair values of derivatives on our consolidated balance sheets are shown below. As of December 31, 2023 and 2022, none of our derivative instruments were designated as hedging instruments. See Note 11—Fair Value Measurements for additional information on derivative fair values.
| Asset Derivatives |  | Liability Derivatives
| Balance Sheet Location |  | December 31, |  | Balance Sheet Location |  | December 31,
|  | 2023 |  | 2022 |  |  | 2023 |  | 2022
|  |  | (in millions) |  |  |  | (in millions)
Natural gas derivatives | Other current assets |  | $ | 1 |  |  | $ | 12 |  |  | Other current liabilities |  | $ | (35) |  |  | $ | (85) |
Schedule of amounts relevant to offsetting of derivative assets | The following table presents amounts relevant to offsetting of our derivative assets and liabilities as of December 31, 2023 and 2022:
| Amounts presented in consolidated balance sheets(1) |  | Gross amounts not offset in consolidated balance sheets |  |
|  | Financial instruments |  | Cash collateral received (pledged) |  | Net amount
| (in millions)
December 31, 2023 |  |  |  |  |  |  |
Total derivative assets | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |
Total derivative liabilities | (35) |  |  | — |  |  | — |  |  | (35) |
Net derivative liabilities | $ | (34) |  |  | $ | — |  |  | $ | — |  |  | $ | (34) |
December 31, 2022 |  |  |  |  |  |  |
Total derivative assets | $ | 12 |  |  | $ | — |  |  | $ | — |  |  | $ | 12 |
Total derivative liabilities | (85) |  |  | — |  |  | — |  |  | (85) |
Net derivative liabilities | $ | (73) |  |  | $ | — |  |  | $ | — |  |  | $ | (73) |
_______________________________________________________________________________ (1)We report the fair values of our derivative assets and liabilities on a gross basis on our consolidated balance sheets. As a result, the gross amounts recognized and net amounts presented are the same.
Schedule of amounts relevant to offsetting of derivative liabilities | The following table presents amounts relevant to offsetting of our derivative assets and liabilities as of December 31, 2023 and 2022:
| Amounts presented in consolidated balance sheets(1) |  | Gross amounts not offset in consolidated balance sheets |  |
|  | Financial instruments |  | Cash collateral received (pledged) |  | Net amount
| (in millions)
December 31, 2023 |  |  |  |  |  |  |
Total derivative assets | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |
Total derivative liabilities | (35) |  |  | — |  |  | — |  |  | (35) |
Net derivative liabilities | $ | (34) |  |  | $ | — |  |  | $ | — |  |  | $ | (34) |
December 31, 2022 |  |  |  |  |  |  |
Total derivative assets | $ | 12 |  |  | $ | — |  |  | $ | — |  |  | $ | 12 |
Total derivative liabilities | (85) |  |  | — |  |  | — |  |  | (85) |
Net derivative liabilities | $ | (73) |  |  | $ | — |  |  | $ | — |  |  | $ | (73) |
_______________________________________________________________________________ (1)We report the fair values of our derivative assets and liabilities on a gross basis on our consolidated balance sheets. As a result, the gross amounts recognized and net amounts presented are the same.

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