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Derivatives and Risk Management Activities - Financial Impact (Details) - Derivatives Not Designated as a Hedge - Commodity Derivatives - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Impact of derivative activities recognized in earnings |  |  |  |
Net gain/(loss) from commodity derivative activity | $ (159) | $ 343 | $ (54) | $ 227
Product sales revenues |  |  |  |
Impact of derivative activities recognized in earnings |  |  |  |
Net gain/(loss) from commodity derivative activity | (142) | 320 | (24) | 183
Field operating costs |  |  |  |
Impact of derivative activities recognized in earnings |  |  |  |
Net gain/(loss) from commodity derivative activity | $ (17) | $ 23 | $ (30) | $ 44

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