Statement of Cash Flows [Abstract] Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, depletion and amortization Depreciation, Depletion and Amortization Dry hole expense Other Noncash Expense Distributions less than income from equity affiliates Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Net before-tax gains on asset retirements and sales Gain (Loss) on Disposition of Property Plant Equipment Net foreign currency effects Foreign Currency Transaction Gain (Loss), Unrealized Deferred income tax provision Deferred Income Taxes and Tax Credits Net (increase) decrease in operating working capital Increase (Decrease) in Operating Capital (Increase) decrease in long-term receivables Increase (Decrease) in Long-term Receivables, Current Decrease (increase) in other deferred charges Increase (Decrease) in Deferred Charges Cash contributions to employee pension plans Pension Contributions Other Other Noncash Income (Expense) Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Productive Assets Proceeds and deposits related to asset sales Proceeds from Sale of Productive Assets Net sales of time deposits Net purchases of time deposits Net purchases of time deposits. Net (purchases) sales of marketable securities Proceeds from Sale and Maturity of Marketable Securities Net repayment of loans by equity affiliates Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties Net (purchases) sales of other short-term investments Payments for (Proceeds from) Short-term Investments Net Cash Used for Investing Activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net borrowings of short-term obligations Proceeds from (Repayments of) Short-term Debt Proceeds from issuances of long-term debt Proceeds from Issuance of Long-term Debt Repayments of long-term debt and other financing obligations Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Cash dividends - common stock Payments of Ordinary Dividends, Common Stock Distributions to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Net purchases of treasury shares Proceeds from (Repurchase of) Equity Net Cash Used for Financing Activities Net Cash Provided by (Used in) Financing Activities Effect of Exchange Rate Changes on Cash and Cash Equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net Change in Cash and Cash Equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents at January 1 Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents at December 31 Debt Disclosure [Abstract] Short term borrowings Short-term Debt [Abstract] Commercial Paper Commercial Paper Notes payable to banks and others with originating terms of one year or less Short-term Bank Loans and Notes Payable Current maturities of long-term debt Long-term Debt, Current Maturities Current maturities of long-term capital leases Current Maturities of Long Term Capital Leases Current maturities of long term capital leases. Redeemable long term obligations - Long-term debt Redeemable Long Term Debt Redeemable long term debt. Redeemable long term obligations - Capital leases Other Short-term Borrowings Subtotal Debt, Current Reclassified to long-term debt Short-term Debt, Refinanced, Amount Total short-term debt Short-term Debt Accounting for Suspended Exploratory Wells [Abstract] Accounting for suspended exploratory wells. Changes in company's suspended exploratory well costs Suspended Well Costs Disclosure [Table Text Block] Suspended well costs disclosure. Aging of capitalized well costs and number of project Schedule of Aging of Capitalized Exploratory Well Costs [Table Text Block] Aging of Costs on Well and Project Basis Aging Costs on Well and Project Basis [Table Text Block] Aging costs on well and project basis. Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Fair market values of stock options and stock appreciation rights granted Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of option activity Schedule of Share-based Compensation, Activity [Table Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Statement, Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] Australia [Member] AUSTRALIA Nigeria [Member] NIGERIA Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment Property, Plant and Equipment, Net Dry hole expense related to prior years expenditures, net Dry Hole Expense Related to Prior Year Net Dry hole expense related to prior year net. Accretion expense Accretion Expense Equity [Abstract] Equity Stockholders' Equity Note Disclosure [Text Block] Summarized Financial Data of Subsidiary One [Abstract] Summarized financial data - Chevron USA Inc. Summarized Financial Data - Chevron U.S.A. Inc. Summarized Financial Data Subsidiary One [Table Text Block] Summarized financial data subsidiary one. Summarized Financial Data and its Subsidiary Summarized Financial Data Subsidiary Net Equity One [Table Text Block] Schedule one of summarized financial data subsidiary net equity. Statement of Comprehensive Income [Abstract] Currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract] Unrealized net change arising during period Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Unrealized holding (loss) gain on securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract] Net (loss) gain arising during period Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Derivatives Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract] Net derivatives (loss) gain on hedge transactions Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Reclassification to net income of net realized (gain) loss Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Income taxes on derivatives transactions Other Comprehensive Income (Loss), Tax Total Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Defined benefit plans Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Actuarial gain (loss) Actuarial Loss [Abstract] Defined benefit plans and actuarial loss. Amortization to net income of net actuarial loss and settlements Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax Actuarial (loss) gain arising during period Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Prior service credits (cost) Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax [Abstract] Amortization to net income of net prior service costs (credits) Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Prior service (costs) credits arising during period Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax Defined benefit plans sponsored by equity affiliates Non Sponsored Defined Benefit Plans Non-sponsored defined benefit plans. Income taxes on defined benefit plans Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax Total Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Other Comprehensive (Loss) Gain, Net of Tax Other Comprehensive Income (Loss), Net of Tax Comprehensive Income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Income Attributable to Chevron Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Operating Segments [Member] Operating Segments [Member] Other Segment Reconciling Item: Excise and Similar Taxes [Member] Segment Reconciling Items [Member] Intersegment Eliminations, Corporate, Non-Segment [Member] Intersegment Eliminations, Corporate, Non-Segment [Member] Intersegment Eliminations, Corporate, Non-Segment [Member] Corporate, Non-Segment [Member] Corporate, Non-Segment [Member] Operating Segments and Coporate, Non-Segment [Member] Operating Segments and Coporate, Non-Segment [Member] Operating Segments and Coporate, Non-Segment [Member] Intersegment Eliminations, Operating Segments and Corporate, Non-Segment [Member] Intersegment Eliminations, Operating Segments and Corporate, Non-Segment [Member] Intersegment Eliminations, Operating Segments and Corporate, Non-Segment [Member] Statement, Business Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Upstream [Member] Upstream Equipment [Member] Downstream [Member] Downstream Equipment [Member] All Other [Member] Corporate and Other, Including Intersegment Eliminations [Member] Corporate and Other, Including Intersegment Eliminations [Member] Total United States [Member] UNITED STATES International [Member] International [Member] Regions other than the Company's domestic country Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Sales and other operating revenues Oil and Gas Revenue Number of reportable segments Number of Reportable Segments Number of operating segments Number of Operating Segments Income Statement [Abstract] Revenues and Other Income Revenues [Abstract] Income from equity affiliates Income (Loss) from Equity Method Investments Other income Other Nonoperating Income Total Revenues and Other Income Revenues Costs and Other Deductions Costs and Expenses [Abstract] Purchased crude oil and products Cost of Purchased Oil and Gas Operating expenses Operating Costs and Expenses Selling, general and administrative expenses Selling, General and Administrative Expense Exploration expenses Exploration Expense Taxes other than on income Taxes Other than on Income Taxes other than on income. Total Costs and Other Deductions Costs and Expenses Income Before Income Tax Expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income Tax Expense Income Tax Expense (Benefit) Net Income Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net Income Attributable to Chevron Corporation Net Income (Loss) Attributable to Parent Net Income Attributable to Chevron Corporation Earnings Per Share [Abstract] – Basic (per share) Earnings Per Share, Basic – Diluted (per share) Earnings Per Share, Diluted Compensation and Retirement Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Corporate [Member] Corporate Debt Securities [Member] Mortgage-Backed Securities [Member] Collateralized Mortgage Backed Securities [Member] Real Estate [Member] Real Estate [Member] Other [Member] Other Plan Assets [Member] Other Plan Assets. Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Beginning Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Actual Return on Plan Assets: Defined Benefit Plan, Actual Return on Plan Assets [Abstract] Assets held at the reporting date Defined Benefit Plan, Actual Return on Plan Assets Still Held Assets sold during the period Defined Benefit Plan, Actual Return on Plan Assets Sold During Period Purchases, Sales and Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Transfers in and/or out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Ending Balance Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Parent [Member] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Capital in Excess of Par Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Member] Currency translation adjustment Accumulated Translation Adjustment [Member] Unrealized net holding (loss) gain on securities Accumulated Net Unrealized Investment Gain (Loss) [Member] Net derivatives gain (loss) on hedge transactions Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Pension and other postretirement benefit plans Accumulated Defined Benefit Plans Adjustment [Member] Deferred Compensation and Benefit Plan Trust Deferred Compensation and Benefit Plan Trust [Member] Deferred compensation and benefit plan trust. Deferred Compensation Deferred Compensation, Share-based Payments [Member] Benefit Plan Trust (Common Stock) Benefit Plan Trust [Member] Benefit Plan Trust [Member] Treasury Stock at Cost Treasury Stock [Member] Noncontrolling Interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at January 1, shares Shares, Issued Balance at January 1 Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net income attributable to Chevron Corporation Cash dividends on common stock Dividends, Common Stock, Cash Stock dividends Dividends, Common Stock, Stock Tax (charge) benefit from dividends paid on unallocated ESOP shares and other Tax Benefit from Dividends Paid on Unallocated ESOP Shares and Other Tax benefit from dividends paid on unallocated ESOP shares and other. Change during year Net reduction of ESOP debt and other Amortization of ESOP Award Purchases, shares Treasury Stock, Shares, Acquired Purchases Treasury Stock, Value, Acquired, Cost Method Issuances - mainly employee benefit plans, shares Stock Issued During Period, Shares, Treasury Stock Reissued Issuances - mainly employee benefit plans Stock Issued During Period, Value, Treasury Stock Reissued Balance at December 31, shares Balance at December 31 Funded status of pension and other postretirement benefit plans Schedule of Net Funded Status [Table Text Block] Consolidated Balance Sheet for pension and other postretirement benefit plans Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Before tax basis amount in accumulated other comprehensive loss Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Pension plans with accumulated benefit obligation in excess of plan assets Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] Components of net periodic benefit cost and amounts recognized in other comprehensive income Schedule of Net Benefit Costs [Table Text Block] Weighted-average assumptions used to determine benefit obligations and net periodic benefit costs Schedule of Assumptions Used [Table Text Block] Effects of change in the assumed health care cost-trend rates Schedule of Health Care Cost Trend Rates [Table Text Block] Fair value measurements of the Company's pension plans Schedule of Allocation of Plan Assets [Table Text Block] The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] Benefit payments, which include estimated future service that are expected to be paid by the company in the next 10 years Schedule of Expected Benefit Payments [Table Text Block] Schedule of Subsidiary Financial Statements [Table] Schedule of Subsidiary Financial Statements [Table] Schedule of subsidiary financial statements. Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Chevron U.S.A. Inc. [Member] Chevron USA Inc [Member] Chevron USA Inc. Subsidiary Statements Captions [Line Items] Subsidiary Statements Captions [Line Items] Subsidiary statements captions. Summarized Financial Data - Chevron U.S.A. Inc. Summarized Financial Data of Subsidiary [Text Block] Summarized financial data of subsidiary. Investments in and Advances to Affiliates, Schedule of Investments [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investment, Equity Method Investee, Name [Axis] Investment, Name [Axis] Equity Method Investee, Name [Domain] Investment, Name [Domain] Upstream [Member] Downstream [Member] All Other [Member] All Other [Member] All other. Variable Interest Entities by Classification of Entity [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Tengizchevroil LLP [Member] Tengizchevroil LLP [Member] Tengizchevroil LLP. Petropiar [Member] Petropiar [Member] Petropiar. Caspian Pipeline Consortium [Member] Caspian Pipeline Consortium [Member] Caspian Pipeline Consortium. Petroboscan [Member] Petroboscan [Member] Petroboscan. Angola LNG Limited [Member] Angola LNG Limited [Member] Angola LNG Limited. Other [Member] Other Vie [Member] Other VIE. GS Caltex Corporation [Member] Gs Caltex Corporation [Member] GS Caltex Corporation. Chevron Phillips Chemical Company LLC [Member] Chevron Phillips Chemical Company LLC [Member] Chevron Phillips Chemical Company LLC. Star Petroleum Refining Company Limited [Member] Star Petroleum Refining Company Limited [Member] Star Petroleum Refining Company Limited. Caltex Australia Limited [Member] Caltex Australia Limited [Member] Caltex Australia Limited. Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Investments and Advances [Member] Investments and Advances [Member] Investments and Advances. Equity in Earnings [Member] Equity in Earnings [Member] Equity in Earnings. United States [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Investments and Advances Equity Method Investments Other at or below cost Cost Method Investments Total investments and advances Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Equity in Earnings Defined Benefit Plans Disclosures, Defined Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] U.S. [Member] United States Pension Plan of US Entity [Member] International [Member] Foreign Pension Plan [Member] Other Benefits [Member] Other Postretirement Benefit Plan [Member] Benefit payments, which include estimated future service, are expected to be paid by the company in the next 10years Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] 2015 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 2016 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2017 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2018 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2019 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2020-2024 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter Summarized Financial Data of Affiliate [Abstract] Summarized financial data of affiliate. Schedule of Affiliate Financial Statements [Table] Schedule of Affiliate Financial Statements [Table] Schedule Of Affiliate Financial Statements. Affiliate Statements Captions [Line Items] Affiliate Statements Captions [Line Items] Affiliate Statements Captions. Current assets Equity Method Investment, Summarized Financial Information, Current Assets Other assets Equity Method Investment, Summarized Financial Information, Noncurrent Assets Current liabilities Equity Method Investment, Summarized Financial Information, Current Liabilities Other liabilities Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities Total TCO net equity Equity Method Investment Summarized Financial Information, Equity Debt Instrument [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Notes Payable [Member] Notes Payable to Banks [Member] Debentures [Member] Unsecured Debt [Member] Medium-term Notes [Member] Medium-term Notes [Member] Corporate Bond Securities [Member] Corporate Bond Securities [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 3.191% notes due 2023 [Member] Notes Payable One [Member] Notes payable one. 1.104% notes due 2017 [Member] One Point One Zero Four Percent Notes Due 2017 [Member] One Point One Zero Four Percent Notes Due 2017 [Member] 1.718% notes due 2018 [Member] One Point Seven One Eight Percent Notes due 2018 [Member] One Point Seven One Eight Percent Notes due 2018 [Member] 2.355% notes due 2022 [Member] Two Point Three Five Five Percent Notes Due 2022 [Member] Two Point Three Five Five Percent Notes Due 2022 [Member] 4.95% notes due 2019 [Member] Notes Payable Three [Member] Notes payable three. 1.345% notes due 2017 [Member] One Point Three Four Five Percent Notes due 2017 [Member] One Point Three Four Five Percent Notes due 2017 [Member] 2.427% notes due 2020 [Member] Two Point Four Two Seven Percent Notes due 2020 [Member] Two Point Four Two Seven Percent Notes due 2020 [Member] 2.193% notes due 2019 [Member] Two Point One Nine Three Percent Notes due 2019 [Member] Two Point One Nine Three Percent Notes due 2019 [Member] 0.889% notes due 2016 [Member] Zero Point Eight Eight Nine Percent Notes due 2016 [Member] Zero Point Eight Eight Nine Percent Notes due 2016 [Member] Variable rate notes due 2016 [Member] Variable rate notes due 2016 [Member] Variable rate notes due 2016 [Member] Variable rate notes due 2017 [Member] Variable rate notes due 2017 [Member] Variable rate notes due 2017 [Member] Variable rate notes due 2019 [Member] Variable rate notes due 2019 [Member] Variable rate notes due 2019 [Member] Variable rate notes due 2021 [Member] Variable rate notes due 2021 [Member] Variable rate notes due 2021 [Member] 8.625% debentures due 2032 [Member] Debenture One [Member] Debenture one. 8.625 % debentures due 2031 [Member] Debenture Two [Member] Debenture two. 8 % debentures due 2032 [Member] Debenture Four [Member] Debenture four. 9.75 % debentures due 2020 [Member] Debenture Five [Member] Debenture five. 8.875 % debentures due 2021 [Member] Debenture Six [Member] Debenture six. Medium-term notes, maturing from 2021 to 2038 (5.92%) [Member] Notes Payable Six [Member] Notes payable six. Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term debt instruments Long-term Debt Debt due within one year Reclassified from short-term debt Total long-term debt Long-term Debt, Excluding Current Maturities Interest rate Debt Instrument, Interest Rate, Stated Percentage Long-term debt maturing 2015 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months Long-term debt maturing 2016 Long-term Debt, Maturities, Repayments of Principal in Year Two Long-term debt maturing 2017 Long-term Debt, Maturities, Repayments of Principal in Year Three Long-term debt maturing 2018 Long-term Debt, Maturities, Repayments of Principal in Year Four Long-term debt maturing 2019 Long-term Debt, Maturities, Repayments of Principal in Year Five Long-term debt maturing after 2019 Long-term Debt, Maturities, Repayments of Principal after Year Five Debt issued Debt Instrument, Face Amount Income Tax Disclosure [Abstract] Income before income tax including related corporate and other charges for U.S. operations Income (Loss) from Continuing Operations before Income Taxes, Domestic Income before income tax for international operations Income (Loss) from Continuing Operations before Income Taxes, Foreign Income tax credits and adjustments Income Tax Credits and Adjustments Effective tax rate Effective Income Tax Rate Reconciliation, Percent Approximate increase in deferred tax liabilities Approximate Increase in Deferred Tax Liabilities Approximate increase in deferred tax liabilities. Deferred tax asset, increase Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Loss carry forward Operating Loss Carryforwards Tax credit carryforward Tax Credit Carryforward, Amount Carry forward amount of foreign tax credit with expiration dates Deferred Tax Assets, Tax Credit Carryforwards, Foreign Undistributed earnings of international consolidated subsidiaries and affiliates for which no deferred income tax provision has been made for future remittances Unremitted Earnings of International Consolidated Subsidiaries and Affiliates with No Deferred Income Tax Provision Unremitted Earnings Of International Consolidated Subsidiaries And Affiliates With No Deferred Income Tax Provision. Percentage of impact of unrecognized tax benefits on effective tax rate if subsequently recognized Percentage of Impact of Unrecognized Tax Benefits on Effective Tax Rate if Subsequently Recognized Percentage of impact of unrecognized tax benefits on effective tax rate if subsequently recognized. Unrecognized tax benefits Unrecognized Tax Benefits Income tax accruals for anticipated interest and penalty obligations Income Tax Examination, Penalties and Interest Accrued Income tax benefit expense associated with interest and penalties Income Tax Examination, Penalties and Interest Expense Consolidated Balance Sheet for pension and other postretirement benefit plans Pension and Other Postretirement Defined Benefit Plans, Liabilities [Abstract] Deferred charges and other assets Defined Benefit Plan, Assets for Plan Benefits, Noncurrent Accrued liabilities Pension and Other Postretirement Defined Benefit Plans, Current Liabilities Noncurrent employee benefit plans Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Net amount recognized at December 31 Defined Benefit Plan, Amounts Recognized in Balance Sheet Properties, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Taxes on income Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] U.S. federal Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Federal Tax Expense (Benefit) Deferred Deferred Federal Income Tax Expense (Benefit) State and local State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current State and Local Tax Expense (Benefit) Deferred Deferred State and Local Income Tax Expense (Benefit) Total United States Federal and State and Local Taxes on Income Federal and state and local taxes on income. International Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Foreign Tax Expense (Benefit) Deferred Deferred Foreign Income Tax Expense (Benefit) Total International Foreign Income Tax Expense (Benefit), Continuing Operations Total taxes on income Reconciliation between the U.S. statutory federal income tax rate and the company's effective income tax rate Effective Income Tax Rate Reconciliation, Percent [Abstract] U.S. statutory federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effect of income taxes from international operations at rates different from the U.S. statutory rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent State and local taxes on income, net of U.S. federal income tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Prior-year tax adjustments Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Effects of changes in tax rates Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective tax rate Sales and other operating revenues Total costs and other deductions Net income Commitments and Contingencies Disclosure [Abstract] Litigation Legal Matters and Contingencies [Text Block] Supplemental Cash Flow Elements [Abstract] Net (increase) decrease in operating working capital was composed of the following: Increase (Decrease) in Operating Capital [Abstract] Decrease (increase) in accounts and notes receivable Increase (Decrease) in Accounts and Notes Receivable Increase in inventories Increase (Decrease) in Inventories (Increase) decrease in prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets (Decrease) increase in accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Decrease in income and other taxes payable Increase (Decrease) in Income Taxes Payable Net (increase) decrease in operating working capital Net cash provided by operating activities includes the following cash payments for income taxes: Net Cash Payments for Interest on Debt and Income Taxes Provided by Operating Activities [Abstract] Net cash payments for interest on debt and income taxes. Income taxes Income Taxes Paid Net (purchases) sales of marketable securities consisted of the following gross amounts: Payments for (Proceeds from) Short-term Investments [Abstract] Marketable securities purchased Payments to Acquire Marketable Securities Marketable securities sold Marketable Securities Sold Marketable securities sold. Net (purchases) sales of marketable securities Net sales of time deposits consisted of the following gross amounts: Time Deposits [Abstract] Time deposits purchased Time deposits purchased Time deposits purchased. Time deposits matured Time deposits matured Time deposits matured. Net sales (purchases) of time deposits Capital expenditures Capital and Exploratory Expenditures, Including Equity Affiliates [Abstract] Capital and exploratory expenditures, including equity affiliates. Additions to properties, plant and equipment Payments to Acquire Oil and Gas Property and Equipment Additions to investments Payments to Acquire Interest in Subsidiaries and Affiliates Current-year dry hole expenditures Results of Operations, Dry Hole Costs Payments for other liabilities and assets, net Payments to Acquire Other Productive Assets Capital expenditures Expensed exploration expenditures Payments to Explore and Develop Oil and Gas Properties Assets acquired through capital lease obligations and other financing obligations Payments to Acquire Equipment on Lease Capital and exploratory expenditures, excluding equity affiliates Capital and exploratory expenditures, excluding equity affiliates Capital and exploratory expenditures, excluding equity affiliates. Company's share of expenditures by equity affiliates Company's share of expenditures by equity affiliates Company's share of expenditures by equity affiliates. Capital and exploratory expenditures, including equity affiliates Capital and exploratory expenditures, including equity affiliates Capital and exploratory expenditures, including equity affiliates. Noncontrolling Interest [Abstract] Activity for equity attributable to noncontrolling interests Activity for Equity Attributable to Noncontrolling Interests [Table Text Block] Activity for equity attributable to noncontrolling interests. U.S equity [Member] Domestic Equity Securities [Member] Domestic Equity Securities. International Equity Securities [Member] International Equity Securities [Member] International Equity Securities [Member] Collective Trusts Mutual Funds Equity [Member] Collective Trusts Mutual Funds Equity Securities [Member] Collective Trusts Mutual Funds Equity Securities. Government [Member] US Treasury and Government [Member] Other Asset Backed [Member] Asset-backed Securities [Member] Collective Trusts/Mutual Funds [Member] Collective Trusts Mutual Funds Debt Securities [Member] Collective Trusts Mutual Funds Debt Securities. Mixed Funds [Member] Mutual Funds Plan Assets [Member] Mutual Funds Plan Assets. Cash And Cash Equivalents [Member] Cash and Cash Equivalents [Member] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value Measurements of Company's Pension Plans Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Fair value of plan assets Defined Benefit Plan, Fair Value of Plan Assets Investment in company's common stock Investment in Company's Common Stock Investment in company's common stock. Leases [Abstract] Schedule of capitalized leased assets Capital Leases in Financial Statements of Lessee Disclosure [Text Block] Rental expenses incurred for operating leases Schedule of Rent Expense [Table Text Block] Estimated future minimum lease payments (net of noncancelable sublease rentals) under operating and capital leases Leases Future Minimum Payments Due [Table Text Block] Leases future minimum payments due. Other Contingencies and Commitments Commitments and Contingencies Disclosure [Text Block] Before tax basis amount in accumulated other comprehensive loss. Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract] Net actuarial loss Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax Prior service (credit) costs Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax Total recognized at December 31 Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Composition of deferred tax balances Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax liabilities Deferred Tax Liabilities, Gross [Abstract] Properties, plant and equipment Deferred Tax Liabilities, Property, Plant and Equipment Investments and other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Net Deferred tax assets Deferred Tax Assets, Gross [Abstract] Foreign tax credits Abandonment/environmental reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations Employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Deferred credits Deferred Tax Assets, Deferred Income Tax loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Other accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Inventory Deferred Tax Assets, Inventory Miscellaneous Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Deferred tax assets valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred taxes, net Deferred Tax Assets, Net Classification of deferred taxes Deferred Tax Assets, Net, Classification [Abstract] Prepaid expenses and other current assets Deferred Tax Components of Prepaid Expenses and Other Current Assets Deferred tax components of prepaid expenses and other current assets. Deferred charges and other assets Deferred Tax Components of Deferred Charges and Other Assets Deferred tax components of deferred charges and other assets . Federal and other taxes on income Deferred Tax Components of Federal and Other Taxes on Income Deferred tax components of federal and other taxes on income. Noncurrent deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Projects with Exploratory Well Costs Capitalized for More than One Year [Table] Projects with Exploratory Well Costs Capitalized for More than One Year [Table] Projects with Exploratory Well Costs Capitalized for More than One Year by Different Stages [Axis] Project [Axis] Projects with Exploratory Well Costs Capitalized for More than One Year by Different Stages [Domain] Project [Domain] Undergoing Front End Engineering and Design with Final Investment Decision Expected [Member] Undergoing Front End Engineering and Design with Final Investment Decision Expected [Member] Undergoing front end engineering and design with final investment decision expected member. Development Concept Under Review by Government [Member] Development Concept Under Review by Government [Member] Development concept under review by government Member. Reviewing Development Alternatives [Member] Reviewing Development Alternatives [Member] Reviewing development alternatives member. Miscellaneous Activities for Projects with Smaller Amounts Suspended [Member] Miscellaneous Activities for Projects with Smaller Amounts Suspended [Member] Miscellaneous Activities for Projects with Smaller Amounts Suspended [Member] Projects with Exploratory Well Costs Capitalized for More than One Year by Different Activities [Axis] Projects with Exploratory Well Costs Capitalized for More than One Year by Different Activities [Axis] Projects with exploratory well costs capitalized for more than one year by different activities. Projects with Exploratory Well Costs Capitalized for More than One Year by Different Activities [Domain] Projects with Exploratory Well Costs Capitalized for More than One Year by Different Activities [Domain] Projects with exploratory well costs capitalized for more than one year by different activities. Drilling Activity [Member] Drilling Activity [Member] Drilling activity. No Drilling Activity [Member] No Drilling Activity [Member] No drilling activity. Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] Capitalized exploratory well costs that have been capitalized for period greater than one year Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year Capitalized exploratory well costs that have been capitalized for period greater than one year, number of wells Exploratory Wells That Have Been Capitalized For Period Greater Than One Year, Number Of Wells With Multiple Completions, Gross Exploratory Wells That Have Been Capitalized For Period Greater Than One Year, Number Of Wells With Multiple Completions, Gross Number of projects with exploratory well costs that have been capitalized for a period greater than one year Projects that have Exploratory Well Costs that have been Capitalized for Period Greater than One Year, Number of Projects Undergoing front-end engineering and design with final investment decision expected in three years Undergoing Front End Engineering and Design With Final Investment Decision Expected in Three Years Undergoing front-end engineering and design with final investment decision expected in three years. Expected period for decision on the recognition of proved reserves Expected Period For Decision on the Recognition of Proved Reserves Expected period for decision on the recognition of proved reserves. Exploratory well costs capitalized for a period greater than one year Capitalized exploratory well costs that are approved and construction in progress Capitalized Costs, Uncompleted Wells, Equipment and Facilities Tengizchevroil LLP [Member] Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Percentage of affiliate by summarized financial information Percentage of Affiliate by Summarized Financial Information Percentage of affiliate by summarized financial information. Sales and other operating revenues Equity Method Investment, Summarized Financial Information, Revenue Costs and other deductions Equity Method Investment, Summarized Financial Information, Cost of Sales Net income attributable to TCO Equity Method Investment, Summarized Financial Information, Net Income (Loss) Fair Value Disclosures [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Marketable securities Investments, Fair Value Disclosure Derivatives Derivative Asset Total Assets at Fair Value Assets, Fair Value Disclosure, Recurring Derivatives Derivative Liability Total Liabilities at Fair Value Financial and Nonfinancial Liabilities, Fair Value Disclosure Information Relating to the Consolidated Statement of Cash Flows Cash Flow, Supplemental Disclosures [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Offsetting Assets [Abstract] Offsetting Derivative Assets [Abstract] Derivative Asset, Gross Amount Recognized Derivative Asset, Fair Value, Gross Asset Derivative Asset, Gross Amounts Offset Derivative Asset, Collateral, Obligation to Return Cash, Offset Derivative Asset, Net Amounts Presented Derivative Assets, Gross Amounts Not Offset Derivative, Collateral, Obligation to Return Securities Derivative Asset, Net Amount Derivative Asset, Fair Value, Amount Offset Against Collateral Offsetting Liabilities [Abstract] Offsetting Derivative Liabilities [Abstract] Derivative Liability, Gross Amount Recognized Derivative Liability, Fair Value, Gross Liability Derivative Liability, Gross Amounts Offset Derivative Liability, Collateral, Right to Reclaim Cash, Offset Derivative Liability, Net Amounts Presented Derivative Liabilities, Gross Amounts Not Offset Derivative, Collateral, Right to Reclaim Securities Derivative Liability, Net Amount Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Commodity Contract [Member] Commodity Contract [Member] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement Location [Axis] Income Statement and Other Comprehensive Income (Loss) Location [Domain] Income Statement Location [Domain] Sales and other operating revenues [Member] Sales [Member] Purchased crude oil and products [Member] Purchased crude oil and products [Member] Purchased crude oil and products. Other Income [Member] Other Income [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative instruments not designated as hedging instruments, gain (loss), net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Asset Retirement Obligation Disclosure [Abstract] Schedule of Changes to the Company's Before-tax Asset Retirement Obligation Schedule of Change in Asset Retirement Obligation [Table Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Related Party Transactions, by Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entity [Member] Affiliated Entity [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Chevron investment carrying value over underlying equity in TCO's net assets Investment in Vie Greater Less than Underlying Equity in Vie Net Assets Vie One Investment in vie greater less than underlying equity in vie net assets vie one. Chevron investment carrying value less underlying equity in Petropiar net assets Decrease in Company Investment Carrying Value over Underlying Equity in Vie Two Net Assets Decrease in company investment carrying value over underlying equity in vie two net assets. Investments and advances Long term loans of Caspian Pipeline Consortium included in investments and advances Long Term Loans Included in Investments and Advances Long term loans included in investments and advances. Percentage of Caspian Pipeline Consortium pipeline construction funded by Loans Loan Provided to Fund Pipe line Construction Loan provided to fund pipe line construction. Chevron investment carrying value over underlying equity in Petroboscan's net assets Investment in Vie Greater Less than Underlying Equity in Vie Net Assets Vie Three Investment in vie greater less than underlying equity in vie net assets vie three. The portion of equity ownership interest held in CP Chemical by Conoco Phillips Corporation Equity Ownership Portion Held by Chemicals Company One Equity ownership portion held by chemicals company one. The portion of equity ownership interest of Caltex Australia Ltd. held by public Portion of Equity Ownership Interest of Vie Nine Held by Public Portion of equity ownership interest of vie nine held by public. Fair value of Chevron share in Caltex Australia Ltd common stock Fair Value of Company Share in Vie Four Common Stock Fair value of company share in vie four common stock. Sale and other operating revenues from affiliated companies Sale and Other Operating Revenues from Affiliated Companies Sale and other operating revenues from affiliated companies. Accounts and notes receivable due from affiliated companies Accounts and Notes Receivable Due from Affiliated Companies Accounts and notes receivable due from affiliated companies. Accounts payable due to affiliated companies Accounts Payable Due to Affiliated Companies Accounts payable due to affiliated companies. Chevron's loan to affiliates Company's Loans to Affiliates Company's loans to affiliates. Statement of Financial Position [Abstract] Allowance for accounts and notes receivable, current Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Treasury stock, shares Treasury Stock, Shares Earnings Per Share Earnings Per Share [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum [Member] Maximum [Member] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Measurement Basis [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount of Long-term Debt [Member] Reported Value Measurement [Member] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Other Bond Securities [Member] Other Bond Securities [Member] Other bond securities. Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Maturity period of primarily bank time deposits, classified as cash equivalents, maximum Maturity Period of Bank time Deposits classified as Cash equivalents Maturity period of primarily bank time deposits, classified as Cash equivalents. Carrying/fair value of cash and cash equivalents Maturity period of bank time deposits reported as time deposits, minimum Maturity Period of Bank Time Deposits Minimum Maturity period of bank time deposits, minimum. Carrying/fair value of time deposits Time Deposits, at Carrying Value Carrying/fair value of investments not included in cash and cash equivalents Restricted Investments, Current Carrying amount of long-term debt Fair value of debt Debt Instrument, Fair Value Disclosure Basic EPS Calculation Earnings Per Share, Basic [Abstract] Earnings available to common stockholders - Basic Weighted-average number of common shares outstanding Weighted Average Number of Common Shares Outstanding Weighted average number of common shares outstanding. Add: Deferred awards held as stock units Deferred Awards Held as Stock Units Deferred awards held as stock units. Total weighted-average number of common shares outstanding Weighted Average Number of Shares Outstanding, Basic Earnings per share of common stock - Basic Diluted EPS Calculation Earnings Per Share, Diluted [Abstract] Earnings available to common stockholders - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Weighted-average number of common shares outstanding Add: Dilutive effect of employee stock-based awards Weighted Average Number Diluted Shares Outstanding Adjustment Total weighted-average number of common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Earnings per share of common stock - Diluted Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Chevron Long-Term Incentive Plan (LTIP) [Member] Chevron Long-Term Incentive Plan (LTIP) [Member] Chevron Long-Term Incentive Plan (LTIP) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Company's share of undistributed earnings for equity affiliates Retained Earnings, Undistributed Earnings from Equity Method Investees Shares remaining available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Remaining Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Remaining Available for Grant Shares available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares available for issuance under company's non employee directors plan Shares Available for Issuance Under Company's Non Employee Directors Plan Shares Available for Issuance under the Chevron Corporation Non-Employee Directors' Plan. Shares authorized for issuance under company's non employee directors plan Shares Authorized for Issuance Under Company's Non Employee Directors Plan Shares Authorized for Issuance under the Company's Non-Employee Directors' Plan. Weighted-average interest rates of commercial paper Debt Instrument, Interest Rate, Effective Percentage Committed credit facilities Line of Credit Facility, Maximum Borrowing Capacity Reclassified to long-term debt Equity in earnings, together with investments in and advances to companies accounted for using the equity method and other investments accounted for at or below cost Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block] Summarized financial information on a 100 percent basis for all equity affiliates as well as Chevron's total share, which includes Chevron loans to affiliates Summarized Financial Information [Table Text Block] Summarized financial information. Organization, Consolidation and Presentation of Financial Statements [Abstract] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Other Assets [Member] Other Assets [Member] Mining Assets [Member] Mining Assets [Member] Mining Assets [Member] Other Assets and Investments [Member] Other Assets and Investments [Member] Other Assets and Investments [Member] Total financing interest and debt costs Interest Costs Incurred Less: Capitalized interest Interest Costs Capitalized Interest and debt expense Interest Expense, Debt Research and development expenses Research and Development Expense Excess of replacement cost over the carrying value of inventories (LIFO method) Excess of Replacement or Current Costs over Stated LIFO Value LIFO profits on inventory drawdowns included in earnings Effect of LIFO Inventory Liquidation on Income Foreign currency effects Foreign Currency Effects Foreign currency effects. Gains on sale of nonstrategic properties Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gain (loss) for impairments and other assets write-offs Gain (Loss) on Impairment Charges and Other Assets Write-offs Gain (Loss) on Impairment Charges and Other Assets Write-offs Company share of equity affiliates foreign currency effects Company Share of Equity Affiliates Foreign Currency Effects Company share of equity affiliates foreign currency effects. Goodwill Goodwill Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] International [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Additional Information Relating to the Consolidated Statement of Cash Flows (Textual) [Abstract] Additional Information Relating to the Consolidated Statement of Cash Flows (Textual) [Abstract] Additional Information Relating to the Consolidated Statement of Cash Flows. Reduction for income tax benefits associated with stock options exercised Excess Tax Benefit from Share-based Compensation, Operating Activities Share repurchase price Payments for Repurchase of Common Stock Stock repurchased during period, shares Stock Repurchased During Period, Shares Stock repurchased during period, value Stock Repurchased During Period, Value Proceeds to be received in future periods for the sale of an equity interest Proceeds to be received in future periods for the sale of an equity interest Proceeds to be received in future periods for the sale of an equity interest Proceeds received for sale of an equity interest Proceeds from Sale of Equity Method Investments Increase in Properties, plant and equipment related to asset exchange in Australia Property, Plant and Equipment, Transfers and Changes Noncash additions to properties, plant and equipment Fair Value of Assets Acquired Fair Value Measurements Fair Value Disclosures [Text Block] Accounting Policies [Abstract] Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Current assets Assets, Current Other assets Other Assets Current liabilities Liabilities, Current Other liabilities Other Liabilities Total CUSA net equity Memo: Total debt Debt Obligation Debt obligation. Long-Term Debt Long-term Debt [Text Block] Short-Term Debt Schedule of Short-term Debt [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivatives, Fair Value, by Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accounts and notes receivable, net [Member] Accounts and notes receivable, net [Member] Accounts and notes receivable net. Long term receivables, net [Member] Long term receivables, net [Member] Long-term receivables net. Accounts payable [Member] Accounts Payable [Member] Deferred credits and other noncurrent obligations [Member] Deferred credits and other noncurrent obligations [Member] Deferred credits and other noncurrent obligations. Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Total Assets at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Total Liabilities at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Stock Options and Other Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Performance Shares [Member] Performance Shares [Member] Stock Options and Stock Appreciation Rights [Member] Stock Options and Stock Appreciation Rights [Member] Stock Options and Stock Appreciation Rights [Member] Compensation expense for stock options Stock or Unit Option Plan Expense After tax compensation expense for stock options After Tax Compensation Expense for Stock Options After tax compensation expense for stock options. Compensation expense for stock appreciation rights restricted stock performance units and restricted stock units Compensation Expense for Stock Appreciation Rights Restricted Stock Performance Units and Restricted Stock Units Compensation expense for stock appreciation rights restricted stock performance units and restricted stock units. Compensation expense for stock appreciation rights, restricted stock, performance units and restricted stock units, after tax After Tax Compensation Expense for Stock Appreciation Rights Restricted Stock Performance Units and Restricted Stock Units After tax compensation expense for stock appreciation rights restricted stock units. Cash received in payment for option exercises Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Tax benefits realized for the tax deductions from option exercises Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options Cash paid to settle performance units and stock appreciation rights Employee Service Share-based Compensation, Cash Flow Effect, Cash Used to Settle Awards Maximum number of share that may be issued under LTIP (in shares) 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) 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 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. Award contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Contractual Term Total intrinsic value options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total before-tax compensation cost related to nonvested share-based compensation arrangements Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted-average period of recognition of unrecognized compensation cost related to nonvested share-based compensation arrangements Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Number of LTIP performance units outstanding (in shares) Number of LTIP Performance Units Outstanding Number of LTIP performance units outstanding. Number of LTIP performance units granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of LTIP performance units vested outstanding (in shares) Number of LTIP Performance Units Vested Outstanding Number of LTIP performance units vested outstanding Number of LTIP performance units forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Fair value of the liability recorded for LTIP performance units outstanding Fair Value of Liability Recorded for LTIP Performance Units Outstanding Fair value of liability recorded for LTIP performance units outstanding. Equivalent shares granted under various LTIP and former Texaco and Unocal programs for outstanding stock appreciation rights and other awards Equivalent Shares Granted for Outstanding Stock Appreciation Rights and Other Awards Equivalent shares granted for outstanding stock appreciation rights and other awards Liability recorded for Equivalent shares granted under various LTIP and former Texaco and Unocal programs for outstanding stock appreciation rights and other awards Liability Recorded for Equivalent Shares Granted Liability recorded for equivalent shares granted. Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Pension Plans With Accumulated Benefit Obligation in Excess of Plan Assets Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract] Projected benefit obligations Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation Accumulated benefit obligations Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation Fair value of plan assets Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets Noncontrolling Interest [Table] Noncontrolling Interest [Table] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Activity for equity attributable to noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Other changes, net Stockholders' Equity, Other Components of Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Income Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, [Abstract] Net Periodic Benefit Cost Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of prior service costs (credits) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Recognized actuarial losses Defined Benefit Plan, Amortization of Gains (Losses) Settlement losses Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements Curtailment losses (gains) Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments Total net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Changes Recognized in Comprehensive Income Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] Net actuarial (gain) loss during period Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax Amortization of actuarial loss Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Prior service (credits) costs during period Amortization of prior service (costs) credits Total changes recognized in other comprehensive income Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax Recognized in Net Periodic Benefit Cost and Other Comprehensive Income Recognized in Net Periodic Benefit Cost and Other Comprehensive Income Recognized In Net Periodic Benefit Cost And Other Comprehensive Income. Taxes Income Tax Disclosure [Text Block] Aging of Capitalized Exploratory Well Costs [Axis] Aging of Capitalized Exploratory Well Costs [Axis] Aging of Capitalized Exploratory Well Costs, Period Range [Domain] Aging of Capitalized Exploratory Well Costs, Period Range [Domain] 1997–2003 [Member] Aging of Capitalized Exploratory Well Costs, Period One [Member] 2004–2008 [Member] Aging of Capitalized Exploratory Well Costs, Period Two [Member] 2009–2013 [Member] Aging of Capitalized Exploratory Well Costs, Period Three [Member] 1999 [Member] Aging of Capitalized Exploratory Well Costs, Period Four [Member] 2003–2009 [Member] Aging of Capitalized Exploratory Well Costs, Period Five [Member] 2010–2014 [Member] Aging Of Capitalized Exploratory Well Costs, Period Six [Member] Period five representing second most current aging period of capitalized exploratory well costs which have been capitalized greater than one year. Number of projects Change in Benefit Obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Benefit obligation at January 1 Defined Benefit Plan, Benefit Obligation Plan participants’ contributions Defined Benefit Plan, Contributions by Plan Participants Plan amendments Defined Benefit Plan, Plan Amendments Actuarial (gain) loss Defined Benefit Plan, Actuarial Gain (Loss) Foreign currency exchange rate changes Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) Benefits paid Defined Benefit Plan, Benefits Paid Divestitures Defined Benefit Plan, Divestitures, Benefit Obligation Benefit obligation at December 31 Change in Plan Assets Fair value of plan assets at January 1 Actual return on plan assets Defined Benefit Plan, Actual Return on Plan Assets Foreign currency exchange rate changes Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets Employer contributions Defined Benefit Plan, Contributions by Employer Divestitures Defined Benefit Plan, Divestitures, Plan Assets Fair value of plan assets at December 31 Funded Status at December 31 Defined Benefit Plan, Funded Status of Plan Schedule of information relating to the consolidated statement of cash flows Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Capital expenditures Capital Expenditures [Table Text Block] Capital expenditures. Fair market values of stock options and stock appreciation rights granted Fair Market Values of Stock Options and Stock Appreciation Rights Granted [Abstract] Fair market values of stock options and stock appreciation rights granted. Stock Option Stock Option [Abstract] Stock Option. Expected term in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate based on zero coupon U.S. treasury note Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted-average fair value per option granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Summary of option activity Summary of Option Activity [Abstract] Summary of option activity. Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at January 1, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Shares, Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Shares, Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Shares, Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Outstanding at December 31, 2014 Shares, Exercisable at December 31, 2014 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price, Outstanding at January 1, 2014 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Outstanding at December 31, 2014 (in dollars per share) Weighted-Average Exercise Price, Exercisable at December 31, 2014 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Average Remaining Contractual Term, Outstanding at December 31, 2014 (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Average Remaining Contractual Term, Exercisable at December 31, 2014 (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value, Outstanding at December 31, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Exercisable at December 31, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Short-Term Debt Short-term Debt [Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Employee Termination Benefits [Member] Business Restructuring Reserves [Member] Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts [Member] Deferred Income Tax Valuation Allowance [Member] Valuation Allowance of Deferred Tax Assets [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at January 1 Valuation Allowances and Reserves, Balance Additions (reductions) charged to expense Valuation Allowances and Reserves, Charged to Cost and Expense Payments Valuation Allowances and Reserves, Adjustments Bad debt write-offs Valuation Allowances and Reserves, Deductions Additions to deferred income tax expense Valuation Allowances and Reserves, Additions to Deferred Income Tax Expense Valuation Allowances and Reserves, Additions to Deferred Income Tax Expense Reduction of deferred income tax expense Valuation Allowances and Reserves, Charged to Other Accounts Balance at December 31 Summarized Financial Data - Tengizchevroil LLP Summarized Financial Data Affiliate [Table Text Block] Summarized financial data affiliate Summarized Financial Data and its Affiliate Summarized Financial Data Affiliate Net Equity [Table Text Block] Summarized financial data affiliate net equity. Segment Earnings Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Segment Assets Reconciliation of Assets from Segment to Consolidated [Table Text Block] Segment Sales and Other Operating Revenues Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Segment income tax expense Segment income tax expense [Table Text Block] Segment income tax expense. Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Summarized Financial Data - Tengizchevroil LLP Summarized Financial Data of Affiliate [Text Block] Summarized financial data of affiliate. Total Income Tax Expense Changes in company's suspended exploratory well costs Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward] Beginning balance at January 1 Capitalized Exploratory Well Costs Additions to capitalized exploratory well costs pending the determination of proved reserves Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves Reclassifications to wells, facilities and equipment based on the determination of proved reserves Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves Capitalized exploratory well costs charged to expense Capitalized Exploratory Well Cost, Charged to Expense Other reductions Capitalized Exploratory Well Cost Other Deductions in Property Sales Capitalized exploratory well cost, other deductions in property sales. Ending balance at December 31 Aging of capitalized well costs and number of project Capitalized Exploratory Well Costs [Abstract] Exploratory well costs capitalized for a period of one year or less Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less Balance at December 31 Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] United States Postretirement Benefit Plan of US Entity [Member] United States Postretirement Benefit Plan of US Entity [Member] ESIP [Member] Other Pension Plan [Member] Equities [Member] Equity Securities [Member] Fixed Income and Cash [Member] Fixed Income and Cash and Cash Equivalents [Member] Fixed Income and Cash and Cash Equivalents [Member] Other [Member] UNITED KINGDOM [Member] UNITED KINGDOM Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Including Portion Funded by Third Party [Member] Including Portion Funded by Third Party [Member] Including Portion Funded by Third Party [Member] Maximum annual increase percentage to company contribution for retiree medical coverage Maximum Annual Increase Percentage to Company Contribution for Retiree Medical Coverage Maximum annual increase percentage to Company contribution for retiree medical coverage. Funded Status: Defined Benefit Plan, Funded Status of Plan [Abstract] Amounts recognized on a before-tax bases in "Accumulated other comprehensive loss" for the company's pension and other postretirement benefit plans Accumulated benefit obligations pension plans Defined Benefit Plan, Accumulated Benefit Obligation Net Actuarial Loss: Defined Benefit Plan, Net Actuarial Gain (Loss) [Abstract] Defined Benefit Plan, Net Actuarial Gain (Loss) [Abstract] Number of years net actuarial losses recorded in "Accumulated other comprehensive loss" at December 31 for the company's US pension plans are being amortized for, over a straight-line basis Number of Years Net Actuarial Losses Recorded in Accumulated Other Comprehensive Loss for Company's Domestic Pension Plans are Being Amortized for Over Straight Line Basis Number of years net actuarial losses recorded in accumulated other comprehensive loss for company's domestic pension plans are being amortized for over straight line basis. Number of years net actuarial losses recorded in "Accumulated other comprehensive loss" at December 31 for the company's international pension plans are being amortized for, over a straight-line basis Number of Years Net Actuarial Losses Recorded in Accumulated Other Comprehensive Loss for Company's International Pension Plans are Being Amortized for Over Straight Line Basis Number of years net actuarial losses recorded in accumulated other comprehensive loss for company's international pension plans are being amortized for over straight line basis. Number of years net actuarial losses recorded in "Accumulated other comprehensive loss" at December 31 for the company's OPEB plans are being amortized for, over a straight-line basis Number of Years Net Actuarial Losses Recorded in Accumulated Other Comprehensive Loss for Company's OPEB Plans are Being Amortized for Over Straight Line Basis Number of years net actuarial losses recorded in accumulated other comprehensive loss for company's OPEB plans are being amortized for over straight line basis. The percentage of the higher of the projected benefit obligation or market-related value of plan assets in excess of which net actuarial losses are amortized Higher Percentage of Projected Benefit Obligation or Market Related Value of Plan Assets of which Losses are Amortized Higher percentage of projected benefit obligation or market related value of plan assets of which losses are amortized. Actuarial gain (loss) that will be amortized from Accumulated other comprehensive loss Defined Benefit Plan, Future Amortization of Gain (Loss) Company's estimated amount that will be recognized from "Accumulated other comprehensive loss" during the next year related to lump-sum settlement costs from U.S. pension plans Company's Estimated Amount That Will be Recognized from Accumulated Other Comprehensive Loss During Next Year Related to Lump Sum Settlement Costs from Domestic Pension Plans Company's estimated amount that will be recognized from accumulated other comprehensive loss during next year related to lump sum settlement costs from domestic pension plans. Weighted average amortization period (in years) for recognizing prior service costs (credits) recorded in "Accumulated other comprehensive loss" at December 31 for US pension plan Weighted Average Amortization Period in Years for Recognizing Prior Service Costs Credits Recorded in Accumulated Other Comprehensive Loss for Domestic Pension Plan Weighted average amortization period in years for recognizing prior service costs credits recorded in accumulated other comprehensive loss for domestic pension plan. Weighted average amortization period (in years) for recognizing prior service costs (credits) recorded in "Accumulated other comprehensive loss" at December 31 for international pension plan Weighted Average Amortization Period in Years for Recognizing Prior Service Costs Credits Recorded in Accumulated Other Comprehensive Loss for International Pension Plan Weighted average amortization period in years for recognizing prior service costs credits recorded in accumulated other comprehensive loss for international pension plan. Weighted average amortization period (in years) for recognizing prior service costs (credits) recorded in "Accumulated other comprehensive loss" at December 31 for other postretirement benefit plan Weighted Average Amortization Period in Years for Recognizing Prior Service Costs Credits Recorded in Accumulated Other Comprehensive Loss for Other Postretirement Benefit Plan Weighted average amortization period in years for recognizing prior service costs credits recorded in accumulated other comprehensive loss for other postretirement benefit plan. Amortization of prior service (credits) costs during the next year Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit) Expected Return on Plan Assets: Defined Benefit Plan, Expected Return on Plan Assets [Abstract] Defined Benefit Plan, Expected Return on Plan Assets [Abstract] Estimated long-term rate of return on US pension plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Percentage of US pension plan assets relative to total pension plan assets Percentage of Domestic Pension Plan Assets Relative to Pension Plan Assets Percentage of domestic pension plan assets relative to pension plan assets. Plan asset market valuation period, prior to year-end measurement date Defined Benefit Plan, Plan Assets at Fair Value, Valuation Techniques, Market Valuation Period Prior to Year-end Measurment Date Defined Benefit Plan, Plan Assets at Fair Value, Valuation Techniques, Market Valuation Period Prior to Year-end Measurment Date Discount Rate: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Discount rate for pension plans Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Other Benefit Assumptions: Defined Benefit Plan, Other Assumptions [Abstract] Defined Benefit Plan, Other Assumptions [Abstract] Assumed health care cost-trend rates in the next fiscal year Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year Ultimate trend rate for health care cost Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Year when the ultimate health care cost trend rate is expected to be reached Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate Maximum annual increase in contribution rate in post retirement benefit Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Primary Investment: Defined Benefit Plan, Primary Investment [Abstract] Defined Benefit Plan, Primary Investment [Abstract] Company's US and UK pension plans as a percentage of total pension assets Company's Pension Plans as Percentage of Pension Assets Company's pension plans as percentage of pension assets. Pension Plan - Board of Trustees approved asset allocation, minimum Defined Benefit Plan, Target Plan Asset Allocations Range Minimum Pension Plan - Board of Trustees approved asset allocation, maximum Defined Benefit Plan, Target Plan Asset Allocations Range Maximum Cash Contributions and Benefit Payments: Defined Benefit Plan, Contributions and Payments [Abstract] Defined Benefit Plan, Contributions and Payments [Abstract] Contributions to employee pension plans Estimated contributions to employee pension plans for the next fiscal year Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year Employee Savings Investment Plan: Employee Savings Investment Plan [Abstract] Employee Savings Investment Plan [Abstract] Compensation expense Allocated Share-based Compensation Expense Value of shares released from LESOP to reduce cost of total company matching contributions to employee accounts within ESIP Value of Shares Released from Leveraged Employee Stock Ownership Plan to Reduce Cost of Company Matching Contributions to Employee Accounts Within ESIP Value of shares released from leveraged employee stock ownership plan to reduce cost of company matching contributions to employee accounts within ESIP. Benefit Plan Trusts: Defined Benefit Plan, Benefit Plan Trusts [Abstract] Defined Benefit Plan, Benefit Plan Trusts [Abstract] Number of Chevron treasury stocks held in benefit plan trust for funding obligations Number of Treasury Stocks Held in Benefit Plan Trust for Funding Obligations Number of treasury stocks held in the benefit plan trust for funding obligations. Various grantor trust assets invested primarily in interest earning accounts Various Grantor Trust Assets Invested Primarily in Interest Earning Accounts Various grantor trust assets invested primarily in interest-earning accounts. Employee Incentive Plan Employee Incentive Plan [Abstract] Employee Incentive Plan [Abstract] Charges to expense for cash bonuses Charges to Expense for Cash Bonuses Charges to expense for cash bonuses. Segment Reconciling Items [Member] Interest income Investment Income, Interest Other Segment Earnings, Other Income Expense Segment earnings, other income (expense). Changes in Accumulated Other Comprehensive Losses Comprehensive Income (Loss) Note [Text Block] Properties, Plant and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Property, Plant and Equipment [Table] All Other Segments [Member] Other Segments [Member] Properties, Plant and Equipment Property, Plant and Equipment, Net, by Type [Abstract] Gross Investment at Cost Property, Plant and Equipment, Gross Net Investment Additions at Cost Property, Plant and Equipment, Additions Depreciation Expense Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] MTBE [Member] MTBE [Member] MTBE. Ecuador Litigation [Member] Ecuador Litigation [Member] Ecuador Litigation [Member] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending Litigation [Member] Pending Litigation [Member] Declatory Relief Claim [Member] Declatory Relief Claim [Member] Declatory Relief Claim [Member] Discovery Stay On Claims [Member] Discovery Stay On Claims [Member] Discovery Stay On Claims [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Pending lawsuits and claims (in number of claims) Loss Contingency, Pending Claims, Number Remediation program term (in years) Conducted Remediation Program Conducted remediation program. Remediation program Remediation program Remediation program. Financial compensation for purported damages on mining engineer's report Financial compensation for purported damages Financial compensation for purported damages. Assessment for purported unjust enrichment on mining engineer's report Assessment for purported unjust enrichment Assessment for purported unjust enrichment. Court order requiring the parties to provide their positions on damages within (in days) Payment to Parties for Damages With in Payment to parties for damages within. Range of possible loss, minimum Loss Contingency, Range of Possible Loss, Minimum Range of possible loss, maximum Loss Contingency, Range of Possible Loss, Maximum Approximate unjust enrichment on plaintiffs' submission, Maximum Approximate Unjust Enrichment Maximum Approximate unjust enrichment, maximum. Approximate unjust enrichment on plaintiffs' submission, Minimum Approximate Unjust Enrichment Minimum Approximate unjust enrichment, minimum. Amount assessed in damages Amount Assessed in Damages Amount assessed in damages. Amount assessed for plaintiffs representatives Amount Assessed for Plaintiffs Representatives Amount assessed for plaintiffs representatives. Additional amount assessed in punitive damages Additional Amount Assessed in Punitive Damages Additional amount assessed in punitive damages. Public apology date within judgment Public Apology Date within Judgment Public apology date within the judgment Approved court-appointed liquadator's report damages for total judgment Litigation Settlement, Amount Litigation Settlement, Amount to be Paid Via Third Party Litigation Settlement, Amount to be Paid Via Third Party Litigation Settlement, Amount to be Paid Via Third Party Proposed additional payment for plaintiff attorney fees as percentage of judgment Proposed Additional Payment for Plaintiff Attorney Fees as Percentage of Judgment Proposed additional payment for plaintiff attorney fees as percentage of judgment. Percentage of payments withheld by third parties due to freeze order Loss Contingency, Percentage of Payments WIthheld by Third Parties Due to Freeze Order Loss Contingency, Percentage of Payments WIthheld by Third Parties Due to Freeze Order Percentage of funds wIthheld by banks due to freeze order Loss Contingency, Percentage of Funds WIthheld by Banks Due to Freeze Order Loss Contingency, Percentage of Funds WIthheld by Banks Due to Freeze Order Number of contract breaches Number of Contract Breaches Number of Contract Breaches Taxes on income Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation between the U.S. statutory federal income tax rate and the company's effective income tax rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Composition of deferred tax balances Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Classification of deferred taxes Classification of Deferred Taxes [Table Text Block] Classification of deferred taxes. Changes to the Company's unrecognized tax benefits Summary of Income Tax Contingencies [Table Text Block] Taxes other than on income Taxes Other Than on Income [Table Text Block] Taxes other than on income. Investments and Advances Investments in and Advances to Affiliates, Schedule of Investments [Text Block] Computation of basic and diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Contingent rentals, renewal option term (in years) Operating Leases, Contingent Rentals, Renewal Option Term Operating Leases, Contingent Rentals, Renewal Option Term Non-cancelable term of operating and capital leases (in years) Leasing Arrangement, Lease Noncancelable Term Leasing Arrangement, Lease Noncancelable Term Schedule of capitalized leased assets Capital Leases, Balance Sheet, Assets by Major Class, Net [Abstract] Upstream Upstream Capital Leases Upstream capital leases. Downstream Downstream Capital Leases Downstream capital leases. All Other Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Gross Total Capital Leased Assets, Gross Less: Accumulated amortization Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Net capitalized leased assets Capital Leases, Balance Sheet, Assets by Major Class, Net Rental expenses incurred for operating leases Operating Leases, Rent Expense, Net [Abstract] Minimum rentals Operating Leases, Rent Expense, Minimum Rentals Contingent rentals Operating Leases, Rent Expense, Contingent Rentals Total Operating Leases, Rent Expense Less: Sublease rental income Operating Leases, Income Statement, Sublease Revenue Net rental expense Operating Leases, Rent Expense, Net Estimated future minimum lease payments (net of noncancelable sublease rentals) under operating and capital leases Leases Future Minimum Payments Due [Abstract] Leases future minimum payments due. Operating Leases, 2015 Operating Leases, Future Minimum Payments Due, Next Twelve Months Capital Leases, 2015 Capital Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, 2016 Operating Leases, Future Minimum Payments, Due in Two Years Capital Leases, 2016 Capital Leases, Future Minimum Payments Due in Two Years Operating Leases, 2017 Operating Leases, Future Minimum Payments, Due in Three Years Capital Leases, 2017 Capital Leases, Future Minimum Payments Due in Three Years Operating Leases, 2018 Operating Leases, Future Minimum Payments, Due in Four Years Capital Leases, 2018 Capital Leases, Future Minimum Payments Due in Four Years Operating Leases, 2019 Operating Leases, Future Minimum Payments, Due in Five Years Capital Leases, 2019 Capital Leases, Future Minimum Payments Due in Five Years Operating Leases, Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Capital Leases, Thereafter Capital Leases, Future Minimum Payments Due Thereafter Operating Leases, Total Operating Leases, Future Minimum Payments Due Capital Leases, Total Capital Leases, Future Minimum Payments Due Less: Amounts representing interest and executory costs Less Amounts Representing Interest and Executory Costs in Future Capital Lease Payments Less: Amounts representing interest and executory costs in future capital lease payments. Net present values Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Less: Capital lease obligations included in short-term debt Capital Lease Obligations, Current Long-term capital lease obligations Capital Lease Obligations, Noncurrent Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Currency Translation Adjustment [Member] Unrealized Holding Gains (Losses) on Securities [Member] Derivatives [Member] Defined Benefit Plans [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Balance at January 1 Accumulated Other Comprehensive Income (Loss), Net of Tax Components of Other Comprehensive Income (Loss): Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract] Before Reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Reclassifications Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Balance at December 31 Employee benefits reclassification component, included in employee benefit costs Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax Income tax expense Schedule of Other Financial Information Schedule of Other Financial Information [Table Text Block] Schedule of other financial information. Accounting for Suspended Exploratory Wells Suspended Well Costs Disclosure [Text Block] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Measurements, Nonrecurring [Member] Properties, plant and equipment, net (held and used) Property, Plant, and Equipment, Fair Value Disclosure Properties, plant and equipment, net (held for sale) Assets Held-for-sale, Long Lived, Fair Value Disclosure Investments and advances Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Total Nonrecurring Assets at Fair Value Assets, Fair Value Disclosure, Nonrecurring Properties, plant and equipment, net (held and used), Before-Tax Loss Property Plant and Equipment Fair Value before Tax Loss Property plant and equipment fair value before tax loss. Properties, plant and equipment, net (held for sale), Before-Tax Loss Assets Held for Sale Long Lived Fair Value before Tax Loss Assets held for sale long lived fair value before tax loss. Investments and advances, Before-Tax Loss Fair Value Investments and Advances before Tax Loss Fair value investments and advances before tax loss. Total Nonrecurring Assets at Fair Value, Before-Tax Loss Assets Fair Value Before Tax Loss Assets Fair Value Before Tax Loss. Schedule II - Valuation And Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] General General [Policy Text Block] General Policy. Subsidiary and Affiliated Companies Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Derivatives Derivatives, Policy [Policy Text Block] Short-Term Investments Short Term Investments [Policy Text Block] Short Term Investments Policy. Inventories Inventory, Policy [Policy Text Block] Properties, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Policy [Policy Text Block] Environmental Expenditures Regulatory Environmental Costs, Policy [Policy Text Block] Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Stock Options and Other Share-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Noncontrolling Interests Consolidation, Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Segment Reporting Segment Reporting, Policy [Policy Text Block] Uncertain Income Tax Positions Income Tax, Policy [Policy Text Block] Accounting for Suspended Exploratory Wells Environmental Costs, Policy [Policy Text Block] Changes to company's unrecognized tax benefits Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance at January 1 Foreign currency effects Unrecognized Tax Benefits Foreign Currency Effects Unrecognized tax benefits foreign currency effects. Additions based on tax positions taken in current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions/reductions resulting from current-year asset acquisitions/sales Unrecognized Tax Benefits Additions or Reductions Resulting from Current Year Asset Acquisitions or Sales Unrecognized tax benefits additions or reductions resulting from current year asset acquisitions Or sales. Additions for tax positions taken in prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Reductions for tax positions taken in prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Settlements with taxing authorities in current year Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Reductions as a result of a lapse of the applicable statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Balance at December 31 Income Tax Authority [Table] Income Tax Authority [Table] Income tax authority. Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] United States Domestic Tax Authority [Member] International Foreign Tax Authority [Member] Income Tax Authority [Line Items] Income Tax Authority [Line Items] Income tax authority. Excise and similar taxes on products and merchandise Excise and Sales Taxes Import duties and other levies Taxes, Other Property and other miscellaneous taxes Real Estate Tax Expense Payroll taxes Payroll Taxes Payroll taxes. Taxes on production Production Tax Expense Total taxes other than on income Company Before Tax Obligation Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Balance at January 1 Asset Retirement Obligation Liabilities incurred Asset Retirement Obligation, Liabilities Incurred Liabilities settled Asset Retirement Obligation, Liabilities Settled Accretion expense Asset Retirement Obligation, Accretion Expense Revisions in estimated cash flows Asset Retirement Obligation, Revision of Estimate Balance at December 31 Long-term portion of the company's before-tax asset retirement obligations Asset Retirement Obligations, Noncurrent Other Contingencies and Commitments [Table] Other Contingencies and Commitments [Table] Other Contingencies and Commitments. Other Contingencies and Commitments [Axis] Other Contingencies and Commitments [Axis] Other Contingencies and Commitments. Other Contingencies and Commitments [Domain] Other Contingencies and Commitments [Domain] Other contingencies and commitments. U.S. Downstream [Member] Domestic Downstream [Member] Domestic downstream. International Downstream [Member] International Downstream [Member] International downstream. Other Businesses [Member] Other Businesses [Member] Other businesses. Sites with Potential Remediation Activities [Member] Sites with Potential Remediation Activities [Member] Sites with potential remediation activities. Environmental Reserve Less Environmental Reserve for Sites with Potential Remediation Activities [Member] Environmental Reserve Less Environmental Reserve for Sites with Potential Remediation Activities [Member] Environmental reserve less environmental reserve for sites with potential remediation activities. Non U.S. Downstream [Member] Non US Downstream [Member] Non-US downstream. Other Contingencies and Commitments [Line Items] Other Contingencies and Commitments [Line Items] Other contingencies and commitments. Guarantees Guarantees [Abstract] Guarantee for payments under terminal use agreements Guarantor Obligations, Current Carrying Value Term of guarantee for payments under terminal use agreement (in years) Guarantor Obligations, Remaining Term Guarantor Obligations, Remaining Term Idemnifications Idemnifications [Abstract] Idemnifications [Abstract] Indemnifications acquirer environmental liabilities, maximum obligation Indemnifications Acquired Company Environ Liabilities Max Obligation Indemnifications acquired company environ liabilities max obligation. Long-Term Unconditional Purchase Obligations and Commitments, Including Throughput and Take-or-Pay Agreements Unconditional Purchase Obligations (Excluding Capital Stock Redemptions) [Abstract] Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2015 Recorded Unconditional Purchase Obligation Due in Next Twelve Months Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2016 Recorded Unconditional Purchase Obligation Due in Second Year Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2017 Recorded Unconditional Purchase Obligation Due in Third Year Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2018 Recorded Unconditional Purchase Obligation Due in Fourth Year Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2019 Recorded Unconditional Purchase Obligation Due in Fifth Year Long term unconditional purchase obligations and commitments, including throughout and take or pay agreements in 2020 and after Recorded Unconditional Purchase Obligation Due after Fifth Year Total payments under long term unconditional purchase obligations and commitments including throughput and Take-or-Pay agreements Payments made under long term unconditional purchase obligations and commitments including throughput and Take or Pay Agreements Payments made under long term unconditional purchase obligations and commitments including throughput and take or pay agreements. Environmental Components of Environmental Loss Accrual [Abstract] Environmental reserve Accrual for Environmental Loss Contingencies, Component Amount Environmental reserve balance Accrual for Environmental Loss Contingencies Sites with potential remediation activities Sites with Potential Remediation Activities Sites with potential remediation activities. Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Assets Assets [Abstract] Cash and cash equivalents Time deposits Marketable securities Marketable Securities, Current Accounts and notes receivable (less allowance: 2014 - $59; 2013 - $62) Accounts, Notes, Loans and Financing Receivable, Net, Current Inventories: Inventory, Net [Abstract] Crude oil and petroleum products Inventory, Finished Goods and Work in Process, Gross Chemicals Energy Related Inventory, Chemicals Materials, supplies and other Other Inventory, Supplies, Gross Total inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense, Current Total Current Assets Long-term receivables, net Accounts Receivable, Net, Noncurrent Investments and advances Properties, plant and equipment, at cost Less: Accumulated depreciation, depletion and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Properties, plant and equipment, net Deferred charges and other assets Other Assets, Noncurrent Assets held for sale Disposal Group, Including Discontinued Operation, Long Lived Assets, Noncurrent Total Assets Assets Liabilities and Equity Liabilities and Equity [Abstract] Short-term debt Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Federal and other taxes on income Accrued Income Taxes, Current Other taxes payable Accrual for Taxes Other than Income Taxes, Current Total Current Liabilities Long-term debt Capital lease obligations Deferred credits and other noncurrent obligations Deferred Revenue and Credits, Noncurrent Noncurrent employee benefit plans Total Liabilities Liabilities Preferred stock (authorized 100,000,000 shares; $1.00 par value; none issued) Preferred Stock, Value, Issued Common stock (authorized 6,000,000,000 shares; $0.75 par value; 2,442,676,580 shares issued at December 31, 2014 and 2013) Common Stock, Value, Issued Capital in excess of par value Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Deferred compensation and benefit plan trust Common Stock Held in Trust Treasury stock, at cost (2014 - 563,027,772 shares; 2013 - 529,073,512 shares) Treasury Stock, Value Total Chevron Corporation Stockholders' Equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total Equity Total Liabilities and Equity Liabilities and Equity Other Financial Information Additional Financial Information Disclosure [Text Block] Lease Commitments Leases of Lessee Disclosure [Text Block] Consolidated Balance Sheet: Fair Value of Derivatives not Designated as Hedging Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Consolidated Balance Sheet: The Effect of Netting Derivative Assets and Liabilities Offsetting Assets and Liabilities [Table Text Block] Offsetting Assets and Liabilities [Table Text Block] Segment Assets Segment Assets [Abstract] Segment Assets Abstract. Total Assets Accounting Standards [Abstract] Accounting standards. New Accounting Standards Accounting Changes and Error Corrections [Text Block] Operating Segments and Geographic Data Segment Reporting Disclosure [Text Block] Includes excise, value-added and similar taxes Schedule of Investments [Table] Schedule of Investments [Table] Affiliates [Member] Affiliates [Member] Affiliates. Parent [Member] Parent Company [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Total revenues Income before income tax expense Summarized Financial Information On Income Before Income Tax Expense Summarized financial information on income before income tax expense. Net income attributable to affiliates Current assets Current assets Noncurrent liabilities Total affiliates’ net equity Financial and Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Weighted-average assumptions were used to determine benefit obligations and net periodic benefit costs Assumptions used to determine benefit obligations: Defined Benefit Plan, Assumptions Used in Calculations [Abstract] Discount rate Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Assumptions used to determine net periodic benefit cost: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Expected return on plan assets Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Effects of change in the assumed health care cost-trend rates Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract] Effect on total service and interest cost components, 1 Percent Increase Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components Effect on total service and interest cost components, 1 Percent Decrease Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components Effect on postretirement benefit obligation, 1 Percent Increase Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation Effect on postretirement benefit obligation, 1 Percent Decrease Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation Long-term debt outstanding Schedule of Long-term Debt Instruments [Table Text Block]