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Name Trading Arrangement, Individual Name Other Postretirement Benefits Other Postretirement Benefits Plan [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Receivables [Abstract] Receivables [Abstract] Olin Corporation [Member] Olin Corporation [Member] Olin Corporation Model Type [Axis] Model Type [Axis] Model Type Inception to date Amounts Utilized (non-cash) Restructuring Reserve, Settled without Cash PLug Power LA LLC PLug Power LA LLC [Member] PLug Power LA LLC Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] Investments in non-consolidated affiliates Payments for Advance to Affiliate Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] 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] Other foreign Other foreign [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. Defined Contribution Plan Employer Contribution of Eligible Compensation Defined Contribution Plan Employer Contribution of Eligible Compensation Amount of employer contribution to a defined contribution plan based on employees' eligible compensation. Performance Share Award, Total Shareholder Return Percent Performance Share Award, Total Shareholder Return Percent Percent of performance share awards that is based on total shareholder return. Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Local Phone Number Local Phone Number 2025 Senior Credit Facility 2025 Senior Credit Facility 2025 Senior Credit Facility Total debt Debt, Long-Term and Short-Term, Combined Amount Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Germany GERMANY Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities OTHER ASSETS Other Assets Disclosure [Text Block] Deferred income taxes Deferred Income Tax Liabilities, Net Asset Acquisition [Abstract] Asset Acquisition [Line Items] Asset Acquisition [Line Items] Monte Carlo Simulation Model Monte Carlo Simulation Model [Member] Monte Carlo Simulation Model Accrued Environmental Loss Contingencies, Current Accrued Environmental Loss Contingencies, Current Other assets Increase (Decrease) in Other Operating Assets Change in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] PEO Total Compensation Amount PEO Total Compensation Amount Capital spending Payments to Acquire Property, Plant, and Equipment [Abstract] Liability derivatives Derivative Liability, Subject to Master Netting Arrangement, before Offset Net change Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Share Repurchase Program [Domain] Share Repurchase Program [Domain] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Common Stock Common Stock [Member] Measure: Measure [Axis] Increases for current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions $1,200.0 million Senior Revolving Credit Facility $1,200.0 million Senior Secured Revolving Credit Facility [Member] $1,200.0 million Senior Secured Revolving Credit Facility Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Entity Emerging Growth Company Entity Emerging Growth Company Open Tax Year Open Tax Year Income Tax, Examination [Table] Income Tax, Examination [Table] ENVIRONMENTAL Environmental Loss Contingency Disclosure [Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Entity Central Index Key Entity Central Index Key Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Inventories Table Schedule of Inventory, Current [Table Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax SHAREHOLDERS' EQUITY Equity [Text Block] Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Total expense Share Based Compensation Arrangement By Share Based Payment Award Total Expense Total equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset. Equity Component [Domain] Equity Component [Domain] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Current installments of long-term debt Amounts due within one year Long-Term Debt, Current Maturities Share Repurchase Program Class of Treasury Stock [Table] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] RECENT ACCOUNTING PRONOUNCEMENTS Accounting Standards Update and Change in Accounting Principle [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Title Trading Arrangement, Individual Title AR Facilities, Recourse Liability Servicing Liability at Amortized Cost, Balance Investments in and Advances to Affiliates Investments in and Advances to Affiliates [Table Text Block] Statement [Table] Statement [Table] Defined Contribution Plan [Table] Defined Contribution Plan [Table] Balance at beginning of year Balance at end of period Unrecognized Tax Benefits Comprehensive loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Internal Revenue Service (IRS) Internal Revenue Service (IRS) [Member] City Area Code City Area Code Current liabilities: Liabilities, Current [Abstract] Lease and other contract termination costs Contract Termination [Member] Interest, net Interest Paid, Excluding Capitalized Interest, Operating Activities Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Investment Company, Nonconsolidated Subsidiary [Domain] Investment Company, Nonconsolidated Subsidiary [Domain] Capital expenditures Payments to Acquire Productive Assets Net change Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Total current assets Assets, Current Losses of non-consolidated affiliates Loss of Non-Consolidated Affiliate Loss of Non-Consolidated Affiliate Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Tax Returns Subject to Examination Summary of Income Tax Examinations [Table Text Block] 2024 Share Repurchase Program 2024 Share Repurchase Program [Member] 2024 Share Repurchase Program Senior Revolving Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Common stock repurchased and retired Payments for Repurchase of Common Stock Amortization of Supply Contracts Amortization of Supply Contracts Amount of amortization recognized in connection with the various long-term supply contracts. Winchester Winchester Segment [Member] Winchester Segment. Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Defined Benefit Plan, Plan Assets, Contributions by Employer, Qualified Plan Defined Benefit Plan, Plan Assets, Contributions by Employer Long-term debt Long-Term Debt, Excluding Current Maturities Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Non-operating pension income Non-operating pension income Non-operating pension income Other Other Intangible Assets [Member] INCOME TAXES Income Tax Disclosure [Text Block] Common stock repurchased and retired Stock Repurchased and Retired During Period, Value Stock Repurchased and Retired During Period, Value Net (loss) income attributable to Olin Corporation per common share: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Long-term debt: Proceeds from (Repayments of) Debt [Abstract] Stock Repurchased and Retired During Period, Shares Stock Repurchased and Retired During Period, Shares Class of Stock [Domain] Class of Stock [Domain] Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Inventories Increase (Decrease) in Inventories Schedule of Debt Schedule of Debt [Table Text Block] Litigation Settlement, Amount Awarded to Other Party Litigation Settlement, Amount Awarded to Other Party Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Net financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Shintech [Member] Shintech [Member] Shintech Unrealized (losses) gains Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax Common stock dividends paid Dividends, Common Stock, Cash Amendment Flag Amendment Flag Long-term Debt, Fair Value Long-Term Debt, Fair Value Defined Contribution Plan Disclosures Defined Contribution Plan Disclosures [Table Text Block] Entity Registrant Name Entity Registrant Name Beginning balance Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Supplies Other Inventory, Supplies, Gross Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Depreciation and amortization Depreciation, Depletion and Amortization Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Gross Profit Gross Profit Variable-rate Senior Revolving Facility Variable-rate Senior Revolving Facility [Member] Variable-rate Senior Revolving Facility Fair Value as of Grant Date Award Grant Date Fair Value Pension assets Assets for Plan Benefits, Defined Benefit Plan Deferred debt issuance costs Debt Issuance Costs, Net DEBT Debt Disclosure [Text Block] Pension and Postretirement Benefits Pension and Postretirement Benefits Summary [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Decrease (increase) in capital expenditures included in accounts payable and accrued liabilities Increase (Decrease) in Capital Expenditures Incurred but Not Yet Paid The increase (decrease) in future cash outflow to pay for purchases of fixed assets that have occurred. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restructuring and Related Activities, Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Restructuring Cost [Table] Restatement Determination Date: Restatement Determination Date [Axis] The Netherlands NETHERLANDS Title of 12(b) Security Title of 12(b) Security Common stock, $1.00 par value per share: authorized, 240.0 shares; issued and outstanding, 114.0, 113.6 and 114.6 shares Common Stock, Value, Issued Restricted Stock or Unit Expense Restricted Stock or Unit Expense Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items] Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items] [Line Items] for Tabular disclosure of amortizable intangible assets, in total and by major class, including the gross carrying amount and accumulated amortization, as well as indefinite lived intangible assets in total and by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. Other investing activities Payments for (Proceeds from) Other Investing Activities Letters of Credit Issued Under Senior Revolving Credit Facility Letters of Credit Issued Under Senior Secured Revolving Credit Facility [Member] Letters of Credit Issued Under Senior Secured Revolving Credit Facility 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] Raw materials Inventory, Raw Materials, Gross Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] 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] 6.625% senior note 6.625% senior note [Member] 6.625% senior note Finished goods Inventory, Finished Goods, Gross Commercial Commercial [Member] Revenues derived from commercial. 9.5% senior note before paydown 9.5% senior note before paydown [Member] 9.5% senior note before paydown Basic Basic Earnings Per Share, Basic Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Chlor Alkali Products and Vinyls Chlor Alkali Products and Vinyls Segment [Member] Chlor Alkali Products and Vinyls Segment. Ownership [Domain] Ownership [Domain] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Goodwill [Table] Goodwill [Table] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Net (loss) income attributable to Olin Corporation Net (loss) income attributable to Olin Corporation Net Income (Loss) Available to Common Stockholders, Basic Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total current liabilities Liabilities, Current 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] Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Total assets Assets Assets Unrecognized Tax Benefits Summary of Income Tax Contingencies [Table Text Block] Cost of goods sold Cost of Goods and Services Sold Letters of Credit Outstanding, Amount Long-Term Line of Credit Income taxes receivable Income Taxes Receivable, Current Other liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Commitments and contingencies Commitments and Contingencies Interest and Debt Expense Interest and Debt Expense Termination Date Trading Arrangement Termination Date Pre 2026 Pre 2026 [Member] Pre 2026 5.125% senior note 5.125% senior note [Member] 5.125% senior note STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Entity Address, City or Town Entity Address, City or Town Borrowings Proceeds from Issuance of Long-Term Debt Hidrogenii JV [Axis] Hidrogenii JV [Axis] Hidrogenii JV Debt Instrument [Axis] Debt Instrument [Axis] Income (Loss) before Income Taxes [Abstract] Segment Reporting Information, Income (Loss) before Income Taxes [Abstract] Stock-based compensation Share-Based Payment Arrangement, Expense Net loss Net (loss) income Net Income (Loss) Attributable to Parent Other operating income (expense) Other Operating Income (Expense), Net Trading Arrangement: Trading Arrangement [Axis] Senior Secured Revolving Credit Subfacility Senior Secured Revolving Credit Subfacility [Member] Senior Secured Revolving Credit Subfacility Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Effective Tax Rate, Discrete Items, net Percent Effective Tax Rate, Discrete Items, net Percent The impact on the effective tax rate of discrete items. Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 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] Foreign Country Foreign Tax Jurisdiction [Member] Entity File Number Entity File Number Cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Variable-rate Recovery Zone bonds Variable-rate Recovery Zone bonds [Member] Variable-rate Recovery Zone bonds Document Fiscal Year Focus Document Fiscal Year Focus Noncontrolling Interest Noncontrolling Interest [Member] Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Name Forgone Recovery, Individual Name Accrued Litigation Contingency Accrued Litigation Contingency Accrued Litigation Contingency Award Date [Domain] Award Date [Domain] Document Period End Date Document Period End Date Performance Share Award, Net Income Percent Performance Share Award, Net Income Percent Percent of performance share awards that is based on net income. 9.5% senior note 9.5% senior note [Member] 9.5% senior note Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Insider Trading Arrangements [Line Items] Foreign Exchange Contract Loss Foreign Exchange Contract Loss [Member] Derivative instrument in a loss position whose primary underlying risk is tied to foreign exchange rates. Decreases for prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Losses of non-consolidated affiliates Net Income (Loss) of non-consolidated affiliate Net Income (Loss) of non-consolidated affiliate Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Other Current Assets Other Current Assets [Member] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Reclassification adjustments of losses (gains) into income Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Corporate/ other Corporate/ other [Member] Corporate/ other Adjustment to Compensation: Adjustment to Compensation [Axis] Net loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Foreign Exchange Contract Foreign Exchange Contract [Member] Reclassification adjustments of losses (gains) into income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Nilico Hydrogen Holdings LLC Nilico Hydrogen Holdings LLC [Member] Nilico Hydrogen Holdings LLC Litigation Case [Domain] Litigation Case [Domain] Accumulated other comprehensive loss Beginning balance Ending balance Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Trade Receivables Pledged as Collateral for Secured Borrowings Trade Receivables Pledged as Collateral for Secured Borrowings Trade Receivables Pledged as Collateral for Secured Borrowings Epoxy Epoxy Segment [Member] Epoxy Segment. Basic Weighted-average common shares - basic Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Other Operating Income Other Operating Income Write-off of equipment and facility Write-off of Equipment and Facility [Member] Write-off of equipment and facility due to restructuring action. Caustic soda Caustic soda [Member] Revenues derived from caustic soda. Total equity Balance at beginning of period Balance at end of period Equity, Including Portion Attributable to Noncontrolling Interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Hunstman Corporation [Member] Hunstman Corporation [Member] Hunstman Corporation Entity Filer Category Entity Filer Category Accrued restructuring costs Restructuring Reserve Company Selected Measure Name Company Selected Measure Name