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Fair Value Measurements - Roll Forward of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Unobservable Inputs (Details) - Level 3 - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | $ 3,782 | $ 3,611 | $ 3,185 | $ 3,458
Increase (decrease) in unrealized gains included in Cost of products sold | (840) | (677) | (175) | (367)
Increase in unrealized losses included in Cost of products sold | 0 | 0 | 0 | 0
Realized (decreases) increases included in Cost of products sold | (1,015) | (46) | (1,260) | 10
Purchases | 5,266 | 4,620 | 9,816 | 8,705
Sales | (3,032) | (3,868) | (7,454) | (8,446)
Settlements | (277) | (221) | (526) | (449)
Transfers into Level 3 | 570 | 584 | 1,075 | 1,268
Transfers out of Level 3 | (494) | (700) | (701) | (876)
Balance at end of period | 3,960 | 3,303 | 3,960 | 3,303
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | 664 | 404 | 329 | 493
Increase (decrease) in unrealized gains included in Cost of products sold | 0 | 0 | 0 | 0
Increase in unrealized losses included in Cost of products sold | 307 | 266 | 862 | 459
Realized (decreases) increases included in Cost of products sold | (1) | (1) | (4) | (3)
Purchases | 14 | 4 | 29 | 7
Sales | (5) | (19) | (6) | (55)
Settlements | (401) | (237) | (623) | (513)
Transfers into Level 3 | 17 | 19 | 47 | 54
Transfers out of Level 3 | (67) | (10) | (106) | (16)
Balance at end of period | 528 | 426 | 528 | 426
Inventory-related Payables |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | 30 | 52 | 16 | 88
Increase (decrease) in unrealized gains included in Cost of products sold | 0 | 0 | 0 | 0
Increase in unrealized losses included in Cost of products sold | 2 | 5 | 3 | 4
Realized (decreases) increases included in Cost of products sold | (1) | (1) | (4) | (3)
Purchases | 14 | 4 | 29 | 7
Sales | (5) | (19) | (6) | (55)
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 0 | 0 | 2 | 0
Transfers out of Level 3 | 0 | 0 | 0 | 0
Balance at end of period | 40 | 41 | 40 | 41
Commodity Derivative Contracts Losses |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | 634 | 352 | 313 | 405
Increase (decrease) in unrealized gains included in Cost of products sold | 0 | 0 | 0 | 0
Increase in unrealized losses included in Cost of products sold | 305 | 261 | 859 | 455
Realized (decreases) increases included in Cost of products sold | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements | (401) | (237) | (623) | (513)
Transfers into Level 3 | 17 | 19 | 45 | 54
Transfers out of Level 3 | (67) | (10) | (106) | (16)
Balance at end of period | 488 | 385 | 488 | 385
Inventories Carried at Market |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | 3,242 | 3,103 | 2,673 | 3,031
Increase (decrease) in unrealized gains included in Cost of products sold | (1,162) | (1,030) | (787) | (933)
Increase in unrealized losses included in Cost of products sold | 0 | 0 | 0 | 0
Realized (decreases) increases included in Cost of products sold | (1,015) | (46) | (1,260) | 10
Purchases | 5,266 | 4,620 | 9,816 | 8,705
Sales | (3,032) | (3,868) | (7,454) | (8,446)
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 554 | 548 | 1,049 | 1,119
Transfers out of Level 3 | (491) | (620) | (675) | (779)
Balance at end of period | 3,362 | 2,707 | 3,362 | 2,707
Commodity Derivative Contracts Gains |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | 540 | 508 | 512 | 427
Increase (decrease) in unrealized gains included in Cost of products sold | 322 | 353 | 612 | 566
Increase in unrealized losses included in Cost of products sold | 0 | 0 | 0 | 0
Realized (decreases) increases included in Cost of products sold | 0 | 0 | 0 | 0
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements | (277) | (221) | (526) | (449)
Transfers into Level 3 | 16 | 36 | 26 | 149
Transfers out of Level 3 | (3) | (80) | (26) | (97)
Balance at end of period | $ 598 | $ 596 | $ 598 | $ 596

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- Definition Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2G -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2G Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2G -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2G Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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