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Summary of Significant Accounting Policies (Details)
12 Months Ended
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Maturity period of bank time deposits reported as time deposits, minimum 90 days
Revenue, performance obligation, description of timing Payment is generally due within 30 days of delivery.
Performance Shares | Chevron Long-Term Incentive Plan (LTIP)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years