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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, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Impact of derivative activities recognized in earnings |  |  |  |
Total gain/(loss) on derivatives recognized in net income | $ (267) | $ (135) | $ (542) | $ 15
Supply and Logistics segment revenues |  |  |  |
Impact of derivative activities recognized in earnings |  |  |  |
Total gain/(loss) on derivatives recognized in net income | (284) | (134) | (598) | 15
Field operating costs |  |  |  |
Impact of derivative activities recognized in earnings |  |  |  |
Total gain/(loss) on derivatives recognized in net income | $ 17 | $ (1) | $ 56 | $ 0

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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