Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Amortization of unrecognized prior service credits included in net periodic costs Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax Maximum [Member] Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Other Restructuring Costs Other Restructuring Costs Share-based Payment Arrangement, Expense, after Tax Share-Based Payment Arrangement, Expense, after Tax Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Debt, Weighted Average Interest Rate Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Segment Reporting [Abstract] Restructuring Plan [Axis] Restructuring Plan [Axis] Common stock ($0.01 par value – 350,000,000 shares authorized; shares issued – 224,218,154 and 223,938,047 as of June 30, 2026 and December 31, 2025) Common Stock, Value, Issued Long-term Borrowings Schedule of Long-Term Debt Instruments [Table Text Block] Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent RETIREMENT PLANS Retirement Benefits [Text Block] Restatement Determination Date Restatement Determination Date Asset Retirement Obligation Type [Axis] Asset Retirement Obligation Type [Axis] Asset Retirement Obligation Type [Axis] Expected return on assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Inventory Write-down Inventory Write-down closure of a performance films production line in Germany closure of a performance films production line in Germany [Member] closure of a performance films production line in Germany Derivative Instrument [Axis] Derivative Instrument [Axis] Changes in estimates recognized in earnings and other Accrual for Environmental Loss Contingencies, Revision in Estimates Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] Receivable Sold Under Factoring Arrangement Receivable Sold Under Factoring Arrangement Receivable Sold Under Factoring Arrangement Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Amendment Flag Amendment Flag Current liabilities Liabilities, Current [Abstract] Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Commercial Paper, Average Rate Paid Commercial Paper, Average Rate Paid Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Growth Initiatives and Businesses not Allocated to Segments [Member] Growth Initiatives [Member] Subcategory of Other Segment operating gain (loss) relating to growth initiatives operating earnings (losses) not attributable to a reportable segment. Does not meet the quantitative thresholds and thus is not classified as reportable segment for which there is an accounting requirement to report separate financial information on those components in the entity's financial statements. Government Assistance, Other Government Assistance, Other [Member] Foreign Exchange [Member] Foreign Exchange [Member] Nonvested Options Nonvested Options [Member] Options that have been issued but have not fully vested at the report date Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Off-Balance-Sheet Credit Exposure, Policy Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Change in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Segment Reporting, Long-Lived Asset, Expenditure for Addition Segment Reporting, Long-Lived Asset, Expenditure for Addition Intangible assets, net of accumulated amortization Intangible Asset, Excluding Goodwill, after Accumulated Amortization Weighted average shares used for basic EPS (in shares) Weighted Average Number of Shares Outstanding, Basic Derivative, Notional Amount Derivative, Notional Amount Retirement Benefits [Abstract] Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Best Estimate Accrued to-date For Asset Retirement Obligation Asset Retirement Obligation Number of Reportable Segments Number of Reportable Segments Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Axis] Total current liabilities Liabilities, Current 4.5% Notes Due Dec 2028 [Member] 4.5% Notes Due Dec 2028 [Member] 4.5% Notes Due Dec 2028 [Member] Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Entity Address, City or Town Entity Address, City or Town Derivative, Fair Value, Net Derivative, Fair Value, Net Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Judicial Ruling Judicial Ruling [Member] growth and profitability improvement initiatives growth and profitability improvement initiatives [Member] growth and profitability improvement initiatives Foreign Plan [Member] Foreign Plan [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Fair Value Hedge Assets Fair Value Hedge Assets Basis of Accounting, Policy [Policy Text Block] Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Derivative, Nonmonetary Notional Amount Derivative, Nonmonetary Notional Amount Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Segment Reporting, Reconciliation of Asset by Segment to Consolidated Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] UNITED STATES UNITED STATES Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Less: Treasury stock at cost (109,891,531 and 109,891,531 shares as of June 30, 2026 and December 31, 2025) Treasury Stock, Value New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Segment Information Disclosure Segment Reporting [Table Text Block] Other Comprehensive Income (Loss), before Tax [Abstract] Other Comprehensive Income (Loss), before Tax [Abstract] Non-Derivatives, Carrying Value [Abstract] Non-Derivatives, Carrying Value [Abstract] The carrying value associated with outstanding non-derivative net investment hedges. Earnings (Loss) Before Interest and Taxes [Abstract] Segment Reporting, Profit (Loss) [Abstract] Other Share-Based Compensation Awards Other Share-Based Compensation Awards [Member] Other Share-Based compensations Awards such as long-term performance stock awards, restricted stock awards, and stock appreciation rights Total other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax Long-term Debt Long-Term Debt Additives And Functional Products [Member] Additives And Functional Products [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Document Period End Date Document Period End Date Changes in operating assets and liabilities, net of effect of acquisitions and divestitures: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Unrecognized Tax Benefits Unrecognized Tax Benefits Debt Instrument, Face Amount Debt Instrument, Face Amount STOCKHOLDERS' EQUITY Equity [Text Block] Earnings Per Share, Basic [Abstract] Earnings Per Share, Basic [Abstract] Security Exchange Name Security Exchange Name Tranche One Tranche One [Member] Tranche One Segment Reporting, Reconciliation of Other Item by Segment to Consolidated Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Table Text Block] Segment Reporting, Reconciliation of Revenue by Segment to Consolidated Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] Debt with Various Maturities Debt with Various Maturities [Member] Debt with Various Maturities Cash Flow Hedge Derivative Instrument Assets at Fair Value Cash Flow Hedge Derivative Instrument Assets at Fair Value Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Less: LIFO reserve Inventory, LIFO Reserve Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Hedged Liability, Statement of Financial Position [Extensible Enumeration] Hedged Liability, Statement of Financial Position [Extensible Enumeration] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Unrealized Gains (Losses) on Derivative Instruments AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Environmental and other costs Environmental and other costs Environmental and other costs Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Government Assistance, Award Amount Government Assistance, Award Amount Total liabilities Liabilities Trading Symbol Trading Symbol Additions to properties and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Schedule of changes to environmental remediation liabilities Roll Forward Of Environmental Remediation Liabilities [Table Text Block] Roll Forward Of Environmental Remediation Liabilities [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Other components of post-employment (benefit) cost, net Pension and Other Postretirement Benefits Cost (Reversal of Cost) Basis of Presentation [Abstract] Basis of Presentation [Abstract] Basis of Presentation [Abstract] Energy Related Derivative [Member] Energy Related Derivative [Member] Diluted earnings per share attributable to Eastman Earnings Per Share, Diluted [Abstract] SHARE BASED COMPENSATION AWARDS [Abstract] SHARE BASED COMPENSATION AWARDS [Abstract] Credit Facility [Domain] Credit Facility [Domain] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted average shares used for diluted EPS (in shares) Weighted Average Number of Shares Outstanding, Diluted Cross Currency Interest Rate Contract [Member] Cross Currency Interest Rate Contract [Member] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] 2027 Term Loan 2027 Term Loan [Member] 2027 Term Loan Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Restructuring Reserve, Accrual Adjustment Restructuring Reserve, Accrual Adjustment Entities [Table] Entities [Table] Derivative Notional Amount, Entered in Period Derivative Notional Amount, Entered in Period Derivative Notional Amount, Entered in Period Borrowings due within one year Short-Term Debt Derivative Liability, Fair Value, Gross Liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Gross profit Gross Profit Dilutive effect of stock options and other awards Weighted Average Number of Shares Outstanding, Diluted, Adjustment Miscellaneous receivables Other Receivables Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock, Common Treasury Stock, Common [Member] Schedule of components of comprehensive income (loss) before tax and net of tax effects Comprehensive Income (Loss) [Table Text Block] Severance Costs Severance Costs Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Effective Income Tax Rate Reconciliation, Tax Credit, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Amount Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Tranche [Domain] Tranche [Domain] Tranche [Domain] Litigation Status [Domain] Litigation Status [Domain] Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Provision / Adjustments Restructuring Reserve, Period Increase (Decrease) Components of net periodic benefit cost Schedule of Net Benefit Costs [Table Text Block] Plan Name [Domain] Plan Name [Domain] Scenario [Domain] Scenario [Domain] Defined benefit pension and other postretirement benefit plans: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] Advanced Materials [Member] Advanced Materials [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Earnings per share, basic and diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Benefit Plans Unrecognized Prior Service Credits Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Price Risk Cash Flow Hedge Unrealized Gain to be Reclassified During Next 12 Months Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months SEGMENT INFORMATION Segment Reporting [Text Block] Minimum [Member] Minimum [Member] Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Loss Contingency, Estimate of Possible Loss Loss Contingency, Estimate of Possible Loss Net periodic benefit (credit) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Pre-tax Amount of Gain (Loss) reclassified From Accumulated Other Comprehensive Income Into Income (Effective Portion) [Abstract] Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] (Deprecated 2025) Derivative [Table] Derivative [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Debt Instrument, Maturity Date Debt Instrument, Maturity Date Text Debt Instrument, Maturity Date Text Exercise Price Award Exercise Price Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Facility Closing [Member] Facility Closing [Member] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Litigation Status [Axis] Litigation Status [Axis] Segment Reporting [Line Items] Segment Reporting [Line Items] Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report Derivative Assets [Abstract] Derivative Asset [Abstract] cost reduction initiatives cost reduction initiatives [Member] cost reduction initiatives Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Interest Rate Swap [Member] Interest Rate Swap [Member] Interest Rate Swap [Member] Debt Disclosure [Text Block] Debt Disclosure [Text Block] Scenario [Axis] Scenario [Axis] Repayment of borrowings Repayments of Long-Term Debt Pension and other postretirement contributions (in excess of) less than expenses Pension And Other Postretirement Benefits Contributions In Excess Of Less Than Expenses The difference between the amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans and the amount recorded as an expense during the period. Derivative Liabilities [Abstract] Derivative Liability [Abstract] Restructuring and Related Costs [Table Text Block] Restructuring and Related Costs [Table Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Balance at Beginning of Period Balance at End of Period Restructuring Reserve Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Credit Facilities [Abstract] Line of Credit Facility [Abstract] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Government Assistance, Type [Axis] Government Assistance, Type [Axis] Adoption Date Trading Arrangement Adoption Date Site Contingency [Table] Site Contingency [Table] Euro Member Countries, Euro Euro Member Countries, Euro Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Total Eastman stockholders' equity Stockholders' Equity Attributable to Parent Equity, Attributable to Parent Cash dividends declared Dividends, Common Stock, Cash Other (income) charges, net Nonoperating Income (Expense) Share-based compensation expense, retirement eligibility preceding the requisite vesting period Share-based compensation expense, retirement eligibility preceding the requisite vesting period Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees, due to retirement eligibility preceding the requisite vesting period. Restructuring Cost and Reserve [Axis] Restructuring Type [Axis] Commercial paper and short-term borrowings [Member] Commercial paper and short-term borrowings [Member] Commercial paper and short-term borrowings [Member] Accrual for Environmental Loss Contingencies, Balance Sheet Classification [Abstract] Accrual for Environmental Loss Contingencies [Abstract] Notional Amount of Nonderivative Instruments Notional Amount of Nonderivative Instruments Environmental Matters Environmental Loss Contingency Disclosure [Text Block] Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Chemical Intermediates [Member] Chemical Intermediates [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Environmental Remediation Site [Axis] Environmental Remediation Site [Axis] Insider Trading Policies and Procedures [Line Items] closure of a heat-transfer fluids production line closure of a heat-transfer fluids production line [Member] Closure of a heat-transfer fluids production line at a North America specialty fluids and energy facility Accrual for Environmental Loss Contingencies [Roll Forward] Accrual for Environmental Loss Contingencies [Roll Forward] Other items, net Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance Shares Performance Shares [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Provision (benefit) from deferred income taxes Deferred Income Tax Expense (Benefit) Selling, general and administrative expenses Selling, General and Administrative Expense Repayments of Debt Repayments of Debt Repayments of Debt Type of Restructuring [Domain] Type of Restructuring [Domain] Business Combination [Domain] Business Combination [Domain] Asset impairments, restructuring, and other charges, net Restructuring, Settlement and Impairment Provisions Restructuring, Settlement and Impairment Provisions Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Underlying options excluded from the computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Entity Central Index Key Entity Central Index Key Inventories valued on the LIFO method Percentage of LIFO Inventory Less: Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Components of net periodic benefit cost [Abstract] Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Asset impairments and restructuring charges, net Asset impairments and restructuring charges, net [Member] Asset impairments and restructuring charges, net Corporate, Non-Segment [Member] Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Other items, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Business Combination [Axis] Business Combination [Axis] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Tranche Three Tranche Three [Member] Tranche Three Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Payments for Legal Settlements Payments for Legal Settlements Schedule of environmental liabilities, current and non-current Schedule of Environmental Liabilities Balance Sheet Line Items [Table Text Block] Schedule Of Environmental Liabilities Balance Sheet Line Items [Table Text Block] LEGAL MATTERS Legal Matters and Contingencies [Text Block] Other Stockholders' Equity, Other Stockholders' equity Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Corporate Cost Actions Corporate Cost Actions [Member] Corporate Cost Actions Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Amount After Tax of Gain (Loss) Recognized in Other Comprehensive Income On Derivatives, Effective Portion [Abstract] ASU 2017-12 Transition [Abstract] (Deprecated 2025) United States of America, Dollars United States of America, Dollars Restructuring and Related Cost, Accelerated Depreciation Restructuring and Related Cost, Accelerated Depreciation Expected Payment Period of Environmental Contingencies Expected Payment Period of Environmental Contingencies Expected period over which payments for aggregated environmental contingent liabilities will be paid. City Area Code City Area Code Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Income Tax Examination [Line Items] Income Tax Examination [Line Items] All Individuals All Individuals [Member] Asset Retirement Obligation Type [Domain] Asset Retirement Obligation Type [Domain] [Domain] for Asset Retirement Obligation Type [Axis] AOCI, Derivative Qualifying as Hedge, Excluded Component OCI, Derivative Qualifying as Hedge, Excluded Component Other comprehensive income (loss) from increase (decrease) in value of excluded component of derivative hedge. Debt Instrument, Fair Value Disclosure Debt Instrument, Fair Value Disclosure Dividends paid to stockholders Payments of Dividends Name Forgone Recovery, Individual Name 1.875% notes due November 2026 [Member] 1.875% notes due November 2026 [Member] 1.875% notes due November 2026 [Member] Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets by Segment Assets Beginning of period End of period Accrual for Environmental Loss Contingencies Prior service credit, net Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Operating Segments [Member] Operating Segments [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Accrued Environmental Loss Contingencies, Current Accrued Environmental Loss Contingencies, Current Share-based Payment Arrangement [Text Block] Share-Based Payment Arrangement [Text Block] Long Term Performance Share Award Long Term Performance Share Award [Member] Long Term Performance Share Award PEO PEO [Member] Total Borrowings Debt, Long-Term and Short-Term, Combined Amount Share-based Payment Arrangement, Expense Share-Based Payment Arrangement, Expense 4.500% Notes Due Feb 2031 4.500% Notes Due Feb 2031 [Member] 4.500% Notes Due Feb 2031 Other long-term liabilities Other Liabilities, Noncurrent Goodwill Goodwill Retirement Plan Type [Axis] Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Retained Earnings [Member] Retained Earnings [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Significant Accounting Policies [Abstract] Significant Accounting Policies [Abstract] Significant Accounting Policies [Abstract] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Award Timing Disclosures [Line Items] Diluted earnings per share attributable to Eastman Earnings Per Share, Diluted Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Cash Flow Hedging [Member] Cash Flow Hedging [Member] Cumulative Translation Adjustment Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Research and development expenses Research and Development Expense  Stockholder's Equity before Treasury Stock Stockholders' Equity before Treasury Stock closure of a solvent-based resins production line at an advanced interlayers facility in North America closure of a solvent-based resins production line at an advanced interlayers facility in North America [Member] closure of a solvent-based resins production line at an advanced interlayers facility in North America Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net properties Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Reconciliation of the changes in stockholders' equity Schedule of Stockholders Equity [Table Text Block] Sales [Abstract] Segment Reporting, Revenue [Abstract] Interest cost Defined Benefit Plan, Interest Cost 5.75% Notes Due March 2033 5.75% Notes Due March 2033 [Member] 5.75% Notes Due March 2033 Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Schedule of Restructuring Reserve by Type of Cost [Table Text Block] INVENTORIES Inventory Disclosure [Text Block] Stock Repurchased During Period, Value Stock Repurchased During Period, Value Stock Option Exercises Stock Issued During Period, Value, Stock Options Exercised Accumulated Other Comprehensive Income Loss Unrealized Gain Loss From Hedges Before Tax Accumulated Other Comprehensive Income Loss Unrealized Gain Loss From Hedges Before Tax Pre-tax monetized positions and mark-to-market gains and losses from derivative and non-derivative hedging instruments designated and qualifying as the effective portion of hedges included in accumulated other comprehensive income. Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Subsegments [Domain] Subsegments [Domain] Site Closure Acetate Yarn Europe Site Closure Acetate Yarn Europe [Member] Site Closure Acetate Yarn Manufacturing Facility Europe Income Tax Jurisdiction, Domestic State and Local Income Tax Jurisdiction, Domestic State and Local [Member] Subsegments [Axis] Subsegments [Axis] Other items, net Payment for (Proceeds from) Other Investing Activity (Increase) decrease in inventories Increase (Decrease) in Inventories Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Environmental ARO [Member] Environmental ARO [Member] Environmental ARO [Member] Segment Reporting [Table] Segment Reporting [Table] Other current assets Other Assets, Current All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Adjustments for Change in Accounting Principle [Axis] Change in Accounting Principle, Type [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Proceeds from Issuance of Debt Proceeds from Issuance of Debt Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Variable compensation payments (in excess of) less than expenses Variable Cash Compensation (In Excess Of) Less Than Expenses Variable compensation (in excess of) less than expenses. The difference between the amount of variable cash or cash equivalents compensation and the amount recorded as an expense during the period. Derivative [Line Items] Derivative [Line Items] Derivatives and hedging: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Non Environmental ARO [Member] Non Environmental ARO [Member] Non Environmental ARO [Member] Restructuring Charge [Roll Forward] Restructuring Reserve [Roll Forward] Tranche Two Tranche Two [Member] Tranche Two Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends, Per Share Cash dividends declared (per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Unrealized Losses on Investments AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax Share-based Compensation Expense Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Service cost Defined Benefit Plan, Service Cost Net increase in commercial paper and other borrowings Proceeds from (Repayments of) Short-Term Debt Income Tax Examination [Table] Income Tax, Examination [Table] Distributions to Noncontrolling Interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Reclassification adjustment for (gains) losses included in net income, net Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Asset impairment charges Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Finished goods Inventory, Finished Goods, Gross Entity Information [Line Items] Entity Information [Line Items] Treasury stock at cost (in shares) Treasury Stock, Common, Shares Accrued Environmental Loss Contingencies, Noncurrent Accrued Environmental Loss Contingencies, Noncurrent Adjustments for Change in Accounting Principle [Domain] Change in Accounting Principle, Type [Domain] Equity Components [Axis] Equity Components [Axis] (Increase) decrease in trade receivables Increase (Decrease) in Accounts Receivable Currency [Axis] Currency [Axis] Entity Interactive Data Current Entity Interactive Data Current Less: Net earnings attributable to noncontrolling interest Net earnings attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Deferred income tax liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Payables and other current liabilities Accounts Payable and Accrued Liabilities, Current Entity Small Business Entity Small Business Comprehensive income attributable to Eastman Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Increase (decrease) in trade payables Increase (Decrease) in Accounts Payable, Trade Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Change in Benefit Plans Unrecognized Prior Service Credits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Net interest expense Interest Income (Expense), Net Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Cash reductions Accrual for Environmental Loss Contingencies, Payments Other noncurrent assets Other Assets, Noncurrent Document Type Document Type Acquisition, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired 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] Fair Value as of Grant Date Award Grant Date Fair Value Adjusted income (loss) from continuing operations before interest expense, interest income, income taxes, noncontrolling interests, net Adjusted income (loss) from continuing operations before interest expense, interest income, income taxes, noncontrolling interests, net Adjusted income (loss) from continuing operations before interest expense, interest income, income taxes, noncontrolling interests, net Site Contingency [Line Items] Site Contingency [Line Items] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Derivative Notional Amount, Settled in Period Derivative Notional Amount, Settled in Period Derivative Notional Amount, Settled in Period Proceeds from borrowings Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Other Postretirement Benefits Plan [Member] Other Postretirement Benefits Plan [Member] Work in process Inventory, Work in Process, Gross Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Net Investment Hedging [Member] Net Investment Hedging [Member] Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Sales Revenues Share based compensation Term life of options Share based compensation Term life of options The maximum period of time an equity-based award can be outstanding. Properties and equipment at cost Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Financial assets and liabilities valued on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Supplier Finance Program, Obligation Supplier Finance Program, Obligation Inventories Total inventories Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Retained Earnings Retained Earnings (Accumulated Deficit) [Abstract] Reclassification adjustment for (gains) losses included in net income, net Reclassification adjustment for (gains) losses included in net income, net Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Shares repurchased (in shares) Treasury Stock, Shares, Acquired Earnings before interest and taxes Earnings before interest and taxes Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net Other Comprehensive Income (Loss), Derivatives and Non-derivatives Qualifying as Hedges, before Tax [Abstract] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract] PEO Name PEO Name Summary of Derivative Instruments [Abstract] Summary of Derivative Instruments [Abstract] 5.625% Notes Due February 2034 5.625% Notes Due February 2034 [Member] 5.625% Notes Due February 2034 Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Business Exit Costs Business Exit Costs Unrealized gain (loss) during period Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Share Repurchases Treasury Stock, Value, Acquired, Cost Method Cash Reductions Payments for Restructuring Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accrual for Environmental Loss Contingencies Disclosure [Abstract] Accrual for Environmental Loss Contingencies Disclosure [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income including noncontrolling interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Share-Based Payment Arrangement, Noncash Expense Share-Based Payment Arrangement, Noncash Expense Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Schedule of inventories Schedule of Inventory, Current [Table Text Block] Basic earnings per share attributable to Eastman Earnings Per Share, Basic Earnings Per Share, Basic Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Total current assets Assets, Current Cost of sales impact from restructuring activities Cost of sales impact from restructuring activities Cost of sales impact from restructuring activities Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Derivative Instruments, Gain (Loss) [Table Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Long-term borrowings Long-Term Debt, Excluding Current Maturities Award Type [Axis] Award Type [Axis] Unrealized gain (loss) during period Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Interest Rate Contract [Member] Interest Rate Contract [Member] Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] At FIFO or average cost (approximates current cost) [Abstract] Inventory, Net, Items Net of Reserve Alternative [Abstract] Trade receivables, net of allowance for credit losses Accounts Receivable, after Allowance for Credit Loss, Current Change in Unrealized Losses on Investments Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Retained earnings at beginning of period Retained earnings at end of period Retained earnings Retained Earnings (Accumulated Deficit) Commodity Contract [Member] Commodity Contract [Member] Change in Laws and Regulations Change in Laws and Regulations [Policy Text Block] Recognition in the financial statement effects of changes in laws or regulations in the period in which the Company obtains a legal right to the related asset or incurs a legal obligation for the related liability. All Currencies [Domain] All Currencies [Domain] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension Plan [Member] Pension Plan [Member] Common Stock [Member] Common Stock [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Japan, Yen Japan, Yen Employee Severance [Member] Employee Severance [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value Derivatives used in Net Investment Hedge, Increase (Decrease), Gross of Tax Derivatives used in Net Investment Hedge, Increase (Decrease), Gross of Tax Cover page. Cover [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Corporate Assets Corporate Assets [Member] Corporate segment information 5.0% Notes Due Aug 2029 5.0% Notes Due Aug 2029 [Member] 5.0% Notes Due Aug 2029 Derivative Contract Type [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Type of Adoption [Domain] Accounting Standards Update [Domain] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and stockholders' equity Liabilities and Equity ASSET IMPAIRMENTS AND RESTRUCTURING Restructuring, Impairment, and Other Activities Disclosure [Text Block] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Asset Retirement Obligation, Current Asset Retirement Obligation, Current Noncontrolling interest Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Plan Name [Axis] Plan Name [Axis] Income Tax Authority [Domain] Income Tax Jurisdiction [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Fibers [Member] Fibers [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Amortization of unrecognized prior service credits included in net periodic costs Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax Parent [Member] Parent [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Properties Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Raw materials and supplies Inventory, Raw Materials and Supplies, Gross Treasury stock purchases Payments for Repurchase of Other Equity Environmental Remediation [Member] Environmental Remediation [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] Loss Contingency, Information about Litigation Matters [Abstract] Loss Contingency, Information about Litigation Matters [Abstract] Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Sales Government incentives, cash received Government incentives, cash received Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Terms of Award Share-Based Compensation Arrangement by Share-Based Payment Award, Terms of Award Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount 1.50% Notes Due 2023 and 1.875% Notes Due 2026 [Member] 1.50% Notes Due 2023 and 1.875% Notes Due 2026 [Member] Carrying value of EUR Net Investment Hedges on 1.50% Notes Due 2023 and 1.875% Notes Due 2026. Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] Name Measure Name PROVISION FOR INCOME TAXES Income Tax Disclosure [Text Block] Change in cumulative translation adjustment, before tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 7.60% debentures due February 2027 [Member] Notes Due February 2027 [Member] 7.60% debentures due 2027 Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Corporate and Other Corporate Segment and Other Operating Segment [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category Restructuring Costs and Asset Impairment Charges [Abstract] Restructuring Costs and Asset Impairment Charges [Abstract] 4.8% notes due September 2042 [Member] Notes Due 2042 [Member] 4.8% notes due 2042 Name Trading Arrangement, Individual Name Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Post-employment obligations Postemployment Benefits Liability, Noncurrent Company Selected Measure Amount Company Selected Measure Amount Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Total inventories at FIFO or average cost Inventory, Gross 4.65% notes due October 2044 [Member] 4.65% notes due 2044 [Member] 4.65% notes due 2044 [Member] Pension and OPEB Costs Not Allocated to Operating Segments [Member] Pension and OPEB Costs Not Allocated to Operating Segments [Member] Portion of Other Segment operating gain (loss) relating to pension and OPEB plan costs not attributable to a reportable segment. Does not meet the quantitative thresholds and thus is not classified as reportable segment for which there is an accounting requirement to report separate financial information on those components in the entity's financial statements. Net earnings Net earnings including noncontrolling interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Director Compensation Plan Director Compensation Plan [Member] Director 2008 Long-Term Compensation Subplan Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Current assets Assets, Current [Abstract] Government Assistance, Type [Domain] Government Assistance, Type [Domain] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Provision for income taxes Income Tax Expense (Benefit) Gain (Loss) on Fair Value Hedges Recognized in Earnings Gain (Loss) on Fair Value Hedges Recognized in Earnings Fair Value Hedging [Member] Fair Value Hedging [Member] Adjustments to reconcile net earnings to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Cost of sales Cost of Product and Service Sold Non-Cash Charges [Member] Non-Cash Charges [Member] Represents non-cash and other charges to the restructuring reserve. Award Timing Method Award Timing Method [Text Block] Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amounts attributable to Eastman stockholders Net Income (Loss) Attributable to Parent [Abstract] Proceeds from Legal Settlements Proceeds from Legal Settlements Share-Based Payment Arrangement, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Net earnings attributable to Eastman Net earnings attributable to Eastman Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Site Contingency, Nature of Contingency [Domain] Environmental Remediation Site [Domain] Restatement Determination Date: Restatement Determination Date [Axis] Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Tranche [Axis] Tranche [Axis] Tranche Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Derivative Asset, Fair Value, Gross Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset 3.8% notes due March 2025 [Member] Notes Due March 2025 [Member] 3.8% notes due 2025 [Member] Share-Based Payment Arrangement Share-Based Payment Arrangement [Member] Fair Value Hedge Liabilities Fair Value Hedge Liabilities Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]