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Derivative Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivative Instruments, Gain (Loss) | The effect of derivatives in our consolidated statements of operations is shown in the table below.
| Gain (loss) recognized in income
|  |  | Three months ended September 30, |  | Nine months ended September 30,
| Location |  | 2022 |  | 2021 |  | 2022 |  | 2021 |  |
|  |  | (in millions)
Unrealized net (losses) gains on natural gas derivatives | Cost of sales |  | $ | (11) |  |  | $ | 12 |  |  | $ | 39 |  |  | $ | 18 |  |  |
Realized net gains (losses) on natural gas derivatives | Cost of sales |  | 12 |  |  | — |  |  | 20 |  |  | (3) |  |  |
Gain on net settlement of natural gas derivatives due to Winter Storm Uri | Cost of sales |  | — |  |  | — |  |  | — |  |  | 112 |  |  |
Net derivative gains |  |  | $ | 1 |  |  | $ | 12 |  |  | $ | 59 |  |  | $ | 127 |  |  |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The fair values of derivatives on our consolidated balance sheets are shown below. As of September 30, 2022 and December 31, 2021, none of our derivative instruments were designated as hedging instruments. See Note 9—Fair Value Measurements for additional information on derivative fair values.
| Asset Derivatives |  | Liability Derivatives
| Balance Sheet Location |  | September 30, 2022 |  | December 31, 2021 |  | Balance Sheet Location |  | September 30, 2022 |  | December 31, 2021
|  |  | (in millions) |  |  |  | (in millions)
Natural gas derivatives | Other current assets |  | $ | 26 |  |  | $ | 16 |  |  | Other current liabilities |  | $ | (20) |  |  | $ | (47) |
Offsetting Liabilities | The following table presents amounts relevant to offsetting of our derivative assets and liabilities as of September 30, 2022 and December 31, 2021:
| 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)
September 30, 2022 |  |  |  |  |  |  |
Total derivative assets | $ | 26 |  |  | $ | — |  |  | $ | — |  |  | $ | 26 |
Total derivative liabilities | (20) |  |  | — |  |  | — |  |  | (20) |
Net derivative assets | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |
December 31, 2021 |  |  |  |  |  |  |
Total derivative assets | $ | 16 |  |  | $ | — |  |  | $ | — |  |  | $ | 16 |
Total derivative liabilities | (47) |  |  | — |  |  | — |  |  | (47) |
Net derivative liabilities | $ | (31) |  |  | $ | — |  |  | $ | — |  |  | $ | (31) |
_______________________________________________________________________________ (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.
Offsetting Assets | The following table presents amounts relevant to offsetting of our derivative assets and liabilities as of September 30, 2022 and December 31, 2021:
| 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)
September 30, 2022 |  |  |  |  |  |  |
Total derivative assets | $ | 26 |  |  | $ | — |  |  | $ | — |  |  | $ | 26 |
Total derivative liabilities | (20) |  |  | — |  |  | — |  |  | (20) |
Net derivative assets | $ | 6 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |
December 31, 2021 |  |  |  |  |  |  |
Total derivative assets | $ | 16 |  |  | $ | — |  |  | $ | — |  |  | $ | 16 |
Total derivative liabilities | (47) |  |  | — |  |  | — |  |  | (47) |
Net derivative liabilities | $ | (31) |  |  | $ | — |  |  | $ | — |  |  | $ | (31) |
_______________________________________________________________________________ (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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