Stock Options and Other Share-Based Compensation (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for stock options	$ 312	$ 287	$ 292
After tax compensation expense for stock options	203	186	190
Compensation expense for stock appreciation rights restricted stock performance units and restricted stock units	32	71	223
Compensation expense for stock appreciation rights, restricted stock, performance units and restricted stock units, after tax	21	46	145
Cash received in payment for option exercises	195	527	553
Tax benefits realized for the tax deductions from option exercises	17	54	73
Cash paid to settle performance units and stock appreciation rights	$ 104	204	186
Maximum number of share that may be issued under LTIP (in shares)	120,753
Total intrinsic value options exercised	$ 120	$ 398	$ 445
Total before-tax compensation cost related to nonvested share-based compensation arrangements	$ 190
Weighted-average period of recognition of unrecognized compensation cost related to nonvested share-based compensation arrangements	1 year 8 months 12 days
Number of LTIP performance units outstanding (in shares)	2,192,937	2,265,952
Number of LTIP performance units granted (in shares)	890,000
Number of LTIP performance units vested outstanding (in shares)	828,868
Number of LTIP performance units forfeited (in shares)	134,147
Fair value of the liability recorded for LTIP performance units outstanding	$ 166
Equivalent shares granted under various LTIP and former Texaco and Unocal programs for outstanding stock appreciation rights and other awards	4,500,000
Liability recorded for Equivalent shares granted under various LTIP and former Texaco and Unocal programs for outstanding stock appreciation rights and other awards	$ 51
Chevron Long-Term Incentive Plan (LTIP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of share that may be issued under LTIP (in shares)	114,000,000
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) [Member] | Maximum [Member] | From April 2004 through May 2023 [Member]
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
Performance Shares [Member] | Chevron Long-Term Incentive Plan (LTIP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)	3 years
Stock Options and Stock Appreciation Rights [Member] | Chevron Long-Term Incentive Plan (LTIP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award contractual term (in years)	10 years