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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 | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Impact of derivative activities recognized in earnings |  |  |  |
Net gain/(loss) from commodity derivative activity | $ 84 | $ (267) | $ (115) | $ (542)
Product sales revenues |  |  |  |
Impact of derivative activities recognized in earnings |  |  |  |
Net gain/(loss) from commodity derivative activity | 76 | (284) | (136) | (598)
Field operating costs |  |  |  |
Impact of derivative activities recognized in earnings |  |  |  |
Net gain/(loss) from commodity derivative activity | $ 8 | $ 17 | $ 21 | $ 56

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