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Risk Management - CF Hedging Effect on the Income Statements (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) recognized in OCI on derivative | $ 202 | $ (404) | $ (563)
Gain/(loss) reclassified from Accumulated OCI into income | 47 | (415) | (356)
Loss to be reclassified within twelve months | 10 |  |
Energy commodity derivative contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) recognized in OCI on derivative | 182 | (338) | (475)
Energy commodity derivative contracts | Revenues—Commodity sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) reclassified from Accumulated OCI into income | 103 | (491) | (271)
Energy commodity derivative contracts | Costs of sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) reclassified from Accumulated OCI into income | (73) | 144 | 20
Energy commodity derivative contracts | Write-down of hedged inventory |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) reclassified from Accumulated OCI into income | 0 | 121 | 41
Interest rate contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) recognized in OCI on derivative | (10) | 7 | 5
Interest rate contracts | Interest, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) reclassified from Accumulated OCI into income | 0 | 0 | 0
Foreign currency contracts |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) recognized in OCI on derivative | 30 | (73) | (93)
Foreign currency contracts | Other, net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain/(loss) reclassified from Accumulated OCI into income | $ 17 | $ (68) | $ (105)

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480870/815-30-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E + Details
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- Definition Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Subparagraph (c) -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C + Details
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