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Financial and Derivative Instruments - Effect of Derivatives Not Designated On Hedging Instruments (Details) - Commodity - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Derivative instruments not designated as hedging instruments, gain (loss), net | $ (38) | $ 305 | $ (166) | $ 47
Sales and other operating revenues |  |  |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Derivative instruments not designated as hedging instruments, gain (loss), net | (71) | 258 | (129) | 18
Purchased crude oil and products |  |  |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Derivative instruments not designated as hedging instruments, gain (loss), net | 35 | 55 | (28) | 16
Other income (loss) |  |  |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Derivative instruments not designated as hedging instruments, gain (loss), net | $ (2) | $ (8) | $ (9) | $ 13

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 182 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-182 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-21 + Details
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