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Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Maturity period of bank time deposits reported as time deposits, minimum | 90 days
Performance Shares | Chevron Long-Term Incentive Plan (LTIP) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Award vesting period | 3 years

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- Definition Maturity period of bank time deposits, minimum. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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