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New Accounting Standards	3 Months Ended
New Accounting Standards	Mar. 31, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Standards	New Accounting Standards Financial Instruments - Credit Losses (Topic 326) Effective January 1, 2020, Chevron adopted Accounting Standards Update (ASU) 2016-13 and its related amendments. For additional information on the company's expected credit losses, refer to Note 17 beginning on page 22.