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Maximum number of shares that may be issued under LTIP in form other than stock option stock appreciation right or award requiring full payment for shares by recipient.

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Share-based Compensation Arrangement by Share-based Payment Award, Contractual Term

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Share-based Compensation, Exchange Ratio due to Acquisition

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Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of noncash expense for option under share-based payment arrangement.

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Stock Options and Other Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 05, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock options		$ 94	$ 81	$ 105
After tax compensation expense for stock options		74	64	83
Compensation expense for stock appreciation rights restricted stock performance units and restricted stock units		96	313	60
Compensation expense for stock appreciation rights, restricted stock, performance units and restricted stock units, after tax		76	266	47
Cash received in payment for option exercises		226	1,090	1,159
Tax benefits realized for the tax deductions from option exercises		8	43	43
Cash paid to settle performance units and stock appreciation rights		$ 95	119	157
Maximum number of share that may be issued under LTIP (in shares)		644,376
Total intrinsic value options exercised		$ 92	$ 516	$ 506
Total before-tax compensation cost related to nonvested share-based compensation arrangements		$ 57
Weighted-average period of recognition of unrecognized compensation cost related to nonvested share-based compensation arrangements		1 year 8 months 12 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)		3,303,933			2,512,345
Shares granted (in shares)		1,253,337
Shares vested (in shares)			165,007
Shares forfeited (in shares)			296,742
Shares vested, fair value		$ 197
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)		4,434,797			4,386,784
Shares granted (in shares)		2,064,598
Shares vested (in shares)		676,282
Shares forfeited (in shares)		1,340,303
Shares vested, fair value		$ 385
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)		4,100,000
Shares vested, fair value		$ 34
Noble, Change-in-Control Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash paid to settle performance units and stock appreciation rights		$ 11
Chevron Long-Term Incentive Plan (LTIP)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of share that may be issued under LTIP (in shares)		67,000,000
For awards issued on or after May 29, 2013, the maximum number of shares that may be in a form other than a stock option, stock appreciation right or award requiring full payment for shares by the award recipient (in shares)		50,000,000
Chevron Long-Term Incentive Plan (LTIP) \| Maximum \| From April 2004 through May 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of share that may be issued under LTIP (in shares)		260,000,000
Chevron Long-Term Incentive Plan (LTIP) \| Performance Shares and Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)		3 years
Chevron Long-Term Incentive Plan (LTIP) \| Stock Options and Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)		10 years
Chevron Long-Term Incentive Plan (LTIP), 2017 Issuance \| Performance Shares and Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)		3 years
Chevron Long-Term Incentive Plan (LTIP), 2017 Issuance \| Stock Options and Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)		10 years
Chevron Long-Term Incentive Plan (LTIP), 2017 Issuance \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)		5 years
Noble Share-Based Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exchange ratio due to acquisition	11.91%
Exercisable period	5 years