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Financial and Derivative Instruments - Additional Information (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Decrease in sales and other operating revenues due to cash flow hedging contracts | $ 2 | $ 0
Deferred losses in accumulated other comprehensive losses due to Outstanding crude oil price hedging contracts | $ 4 |

X
- Definition Deferred Losses In Accumulated Other Comprehensive Losses Due To Outstanding Crude Oil Price Hedging Contracts + References No definition available. + Details
Name: | cvx_DeferredLossesInAccumulatedOtherComprehensiveLossesDueToOutstandingCrudeOilPriceHedgingContracts
Namespace Prefix: | cvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Increase (Decrease) In Sales And Other Operating Revenues Due To Cash Flow Hedging Contracts + References No definition available. + Details
Name: | cvx_IncreaseDecreaseInSalesAndOtherOperatingRevenuesDueToCashFlowHedgingContracts
Namespace Prefix: | cvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration