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Financial and Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments | Consolidated Balance Sheet: Fair Value of Derivatives
|  |  |  |  |  |  | At December 31 |
Type of Contract |  | Balance Sheet Classification |  | 2023 |  |  | 2022 |
Commodity |  | Accounts and notes receivable |  | $ | 151 |  |  | $ | 175 |
Commodity |  | Long-term receivables, net |  |  | 8 |  |  |  | 9 |
Total assets at fair value |  | $ | 159 |  |  | $ | 184 |
Commodity |  | Accounts payable |  | $ | 216 |  |  | $ | 46 |
Commodity |  | Deferred credits and other noncurrent obligations |  |  | 46 |  |  |  | 12 |
Total liabilities at fair value |  | $ | 262 |  |  | $ | 58 |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments | Consolidated Statement of Income: The Effect of Derivatives
Type of Derivative |  | Statement of |  | Gain/(Loss) Year ended December 31 |
Contract |  | Income Classification |  | 2023 |  |  | 2022 |  |  | 2021 |
Commodity |  | Sales and other operating revenues |  | $ | (304 | ) |  | $ | (651 | ) |  | $ | (685) |
Commodity |  | Purchased crude oil and products |  |  | (154 | ) |  |  | (226 | ) |  |  | (64) |
Commodity |  | Other income (loss) |  |  | (47 | ) |  |  | 10 |  |  |  | (46) |
|  |  |  | $ | (505 | ) |  | $ | (867 | ) |  | $ | (795) |
Consolidated Balance Sheet: The Effect of Netting Derivative Assets | The table below represents gross and net derivative assets and liabilities subject to netting agreements on the Consolidated Balance Sheet at December 31, 2023 and 2022. Consolidated Balance Sheet: The Effect of Netting Derivative Assets and Liabilities
At December 31, 2023 |  | Gross Amounts Recognized |  |  | Gross Amounts Offset |  |  | Net Amounts Presented |  |  | Gross Amounts Not Offset |  |  | Net Amounts |
Derivative Assets - not designated |  | $ | 2,394 |  |  | $ | 2,242 |  |  | $ | 152 |  |  | $ | 4 |  |  | $ | 148 |
Derivative Assets - designated |  | $ | 8 |  |  | $ | 1 |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |
Derivative Liabilities - not designated |  | $ | 2,504 |  |  | $ | 2,242 |  |  | $ | 262 |  |  | $ | 15 |  |  | $ | 247 |
Derivative Liabilities - designated |  | $ | 1 |  |  | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
At December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Assets - not designated |  | $ | 2,591 |  |  | $ | 2,407 |  |  | $ | 184 |  |  | $ | 5 |  |  | $ | 179 |
Derivative Assets - designated |  | $ | 8 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Derivative Liabilities - not designated |  | $ | 2,450 |  |  | $ | 2,407 |  |  | $ | 43 |  |  | $ | — |  |  | $ | 43 |
Derivative Liabilities - designated |  | $ | 23 |  |  | $ | 8 |  |  | $ | 15 |  |  | $ | — |  |  | $ | 15 |
Consolidated Balance Sheet: The Effect of Netting Derivative Liabilities | The table below represents gross and net derivative assets and liabilities subject to netting agreements on the Consolidated Balance Sheet at December 31, 2023 and 2022. Consolidated Balance Sheet: The Effect of Netting Derivative Assets and Liabilities
At December 31, 2023 |  | Gross Amounts Recognized |  |  | Gross Amounts Offset |  |  | Net Amounts Presented |  |  | Gross Amounts Not Offset |  |  | Net Amounts |
Derivative Assets - not designated |  | $ | 2,394 |  |  | $ | 2,242 |  |  | $ | 152 |  |  | $ | 4 |  |  | $ | 148 |
Derivative Assets - designated |  | $ | 8 |  |  | $ | 1 |  |  | $ | 7 |  |  | $ | — |  |  | $ | 7 |
Derivative Liabilities - not designated |  | $ | 2,504 |  |  | $ | 2,242 |  |  | $ | 262 |  |  | $ | 15 |  |  | $ | 247 |
Derivative Liabilities - designated |  | $ | 1 |  |  | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
At December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Assets - not designated |  | $ | 2,591 |  |  | $ | 2,407 |  |  | $ | 184 |  |  | $ | 5 |  |  | $ | 179 |
Derivative Assets - designated |  | $ | 8 |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Derivative Liabilities - not designated |  | $ | 2,450 |  |  | $ | 2,407 |  |  | $ | 43 |  |  | $ | — |  |  | $ | 43 |
Derivative Liabilities - designated |  | $ | 23 |  |  | $ | 8 |  |  | $ | 15 |  |  | $ | — |  |  | $ | 15 |

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