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Risk Management Activities - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021
--- | --- | --- | ---
Derivatives, Fair Value [Line Items] |  |  |
Derivative liability, current | $ 243 | $ 269 |
Collateral posted on derivative | 546 |  | $ 308
Price Risk Derivative | Other Assets |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative asset, noncurrent | 0 | 6 |
Derivative asset, fair value, gross asset |  | 7 |
Derivative liability, fair value, gross liability |  | 1 |
Price Risk Derivative | Liabilities From Price Risk Management Activities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative liability, current | 243 | 269 |
Derivative asset, fair value, gross asset | 25 | 29 |
Derivative liability, fair value, gross liability | 547 | 421 |
Collateral posted on derivative | 279 | 123 |
Price Risk Derivative | Other Liabilities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative liability, noncurrent | 399 | 37 |
Derivative asset, fair value, gross asset | 4 | 10 |
Derivative liability, fair value, gross liability | 810 | 64 |
Collateral posted on derivative | $ 407 | $ 17 |

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