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Stock Options and Other Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation expense for stock options | $ 105 | $ 137 | $ 271
After tax compensation expense for stock options | 83 | 89 | 176
Compensation expense for stock appreciation rights restricted stock performance units and restricted stock units | 60 | 231 | 371
Compensation expense for stock appreciation rights, restricted stock, performance units and restricted stock units, after tax | 47 | 150 | 241
Cash received in payment for option exercises | 1,159 | 1,100 | 647
Tax benefits realized for the tax deductions from option exercises | 43 | 48 | 21
Cash paid to settle performance units and stock appreciation rights | $ 157 | 187 | 82
Maximum number of share that may be issued under LTIP (in shares) | 748,211 |  |
Total intrinsic value options exercised | $ 506 | $ 407 | $ 240
Total before-tax compensation cost related to nonvested share-based compensation arrangements | $ 53 |  |
Weighted-average period of recognition of unrecognized compensation cost related to nonvested share-based compensation arrangements | 1 year 7 months 6 days |  |
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) | 78,000,000 |  |
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 |  |
Performance Shares and Restricted Stock Units (RSUs) | Chevron Long-Term Incentive Plan (LTIP) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award contractual term (in years) | 3 years |  |
Performance Shares and Restricted Stock Units (RSUs) | Chevron Long-Term Incentive Plan (LTIP), 2017 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award contractual term (in years) | 3 years |  |
Stock Options and Stock Appreciation Rights | Chevron Long-Term Incentive Plan (LTIP) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award contractual term (in years) | 10 years |  |
Stock Options and Stock Appreciation Rights | Chevron Long-Term Incentive Plan (LTIP), 2017 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award contractual term (in years) | 10 years |  |
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) | 1,737,479 | 1,236,500 |
Shares granted (in shares) | 819,769 |  |
Shares vested (in shares) | 222,946 |  |
Shares forfeited (in shares) | 95,844 |  |
Shares vested, fair value | $ 125 |  |
Restricted Stock Units (RSUs) | Chevron Long-Term Incentive Plan (LTIP), 2017 Issuance |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award contractual term (in years) | 5 years |  |
Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) | 3,669,730 | 3,090,793 |
Shares granted (in shares) | 1,491,141 |  |
Shares vested (in shares) | 746,450 |  |
Shares forfeited (in shares) | 165,754 |  |
Shares vested, fair value | $ 258 |  |
Stock Appreciation Rights (SARs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares outstanding (in shares) | 4,200,000.0 |  |
Shares vested, fair value | $ 70 |  |

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- Definition Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901 + Details
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