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Fair Value Measurements (Reconciliation Of Assets Measured At Fair Value On A Recurring Basis) (Details) - Significant Unobservable Inputs (Level 3) [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Balance at beginning of period | $ 4,125 | $ 3,375 | $ 3,464 | $ 3,042
Total increase (decrease) in unrealized gains included in cost of products sold | 660 | 358 | 2,043 | 1,679
Purchases | 13,294 | 7,351 | 34,524 | 20,899
Sales | (13,931) | (7,346) | (35,239) | (21,334)
Settlements | (456) | (311) | (1,227) | (1,134)
Transfers into Level 3 | 433 | 239 | 1,298 | 1,210
Transfers out of Level 3 | (337) | (679) | (1,075) | (1,375)
Balance at end of period | 3,788 | 2,987 | 3,788 | 2,987
Inventories Carried At Market [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Balance at beginning of period | 3,245 | 2,824 | 3,004 | 2,183
Total increase (decrease) in unrealized gains included in cost of products sold | 315 | 70 | 746 | 875
Purchases | 13,294 | 7,351 | 34,524 | 20,899
Sales | (13,931) | (7,346) | (35,239) | (21,334)
Settlements | 0 | 0 | 0 | 0
Transfers into Level 3 | 384 | 205 | 933 | 1,131
Transfers out of Level 3 | (221) | (602) | (882) | (1,252)
Balance at end of period | 3,086 | 2,502 | 3,086 | 2,502
Commodity Derivative Contracts Gains [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Balance at beginning of period | 880 | 551 | 460 | 859
Total increase (decrease) in unrealized gains included in cost of products sold | 345 | 288 | 1,297 | 804
Purchases | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements | (456) | (311) | (1,227) | (1,134)
Transfers into Level 3 | 49 | 34 | 365 | 79
Transfers out of Level 3 | (116) | (77) | (193) | (123)
Balance at end of period | $ 702 | $ 485 | $ 702 | $ 485

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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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