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Financial and Derivative Instruments - Schedule of Consolidated Balance Sheet: Fair Value of Derivatives (Details) - Commodity - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
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Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Assets at Fair Value | $ 30 | $ 264
Total Liabilities at Fair Value | 28 | 68
Balance Sheet Location [Axis]: us-gaap:AccountsNotesAndLoansReceivableNetCurrent |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Assets at Fair Value | 30 | 191
Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Liabilities at Fair Value | 23 | 60
Balance Sheet Location [Axis]: us-gaap:AccountsReceivableExcludingAccruedInterestAfterAllowanceForCreditLossNoncurrent |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Assets at Fair Value | 0 | 73
Balance Sheet Location [Axis]: cvx:ContractWithCustomerLiabilityAndOtherNoncurrentLiability |  |
Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments |  |
Total Liabilities at Fair Value | $ 5 | $ 8

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