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Other Contingencies and Commitments (Details) | Dec. 31, 2009 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Indemnifications acquirer environmental liabilities max obligation | $ 200,000,000

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- Definition Indemnifications acquired company environ liabilities max obligation. + References No definition available. + Details
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Namespace Prefix: | cvx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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