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Instrument, Borrowing Base Calculation, Amount Of Eligible Cash, Cap, Percentage Of Borrowing Base Debt Instrument, Borrowing Base Calculation, Amount Of Eligible Cash, Cap, Percentage Of Borrowing Base Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Consideration Disposal Group, Including Discontinued Operation, Consideration Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Accounts and other receivables Increase (Decrease) in Accounts and Other Receivables Other Segments Other costs Segments Other costs Distribution Distribution [Member] Distribution [Member] Stock-based compensation expense Employee Benefits and Share-Based Compensation Restatement Determination Date Restatement Determination Date Adoption Date Trading Arrangement Adoption Date Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Other receivables Other Receivables Pension and postretirement benefit plan contributions Payment for Pension and Other Postretirement Benefits Income taxes recoverable/payable Increase (Decrease) in Income Taxes Receivable Amortization of prior service costs and net gains or losses, tax benefit Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Right-of-use leased assets Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Unrealized foreign currency translation adjustment, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Segments [Axis] Segments [Axis] 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] Derivative Instrument [Axis] Derivative Instrument [Axis] Exercise Price Award Exercise Price Selling, general and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense EARNINGS PER SHARE Earnings Per Share [Text Block] Arrangement Duration Trading Arrangement Duration Consumer durables Consumer Durables [Member] Consumer Durables [Member] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Shareholders’ equity: Equity, Attributable to Parent [Abstract] Gain on investment in kaléo Gain on investment in kaléo Gain (Loss) on Investments Other income (expense), net Disposal Group, Including Discontinued Operation, Other Income (Expense), Net Disposal Group, Including Discontinued Operation, Other Income (Expense), Net Shares used to compute earnings (loss) per share: Earnings Per Share, Basic, Other Disclosure [Abstract] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text 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Segment Reporting [Abstract] Segment Reporting [Abstract] Pension and other postretirement benefit obligations, net Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent Entity Central Index Key Entity Central Index Key Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Cost of goods sold Disposal Group, Including Discontinued Operation, Costs of Goods Sold Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Debt assumed Disposal Group, Including Discontinued Operation, Debt Disposal Group, Including Discontinued Operation, Debt Accounts payable and accrued expenses Increase (Decrease) in Accounts 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translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Schedule of Pricing Under the ABL Facility Schedule Of Borrowings Under Credit Agreement At Various Indebtedness To Adjusted Ebitda Levels [Table Text Block] Schedule Of Borrowings Under Credit Agreement At Various Indebtedness To Adjusted Ebitda Levels Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Summary of Derivative Instruments [Abstract] Summary of Derivative Instruments [Abstract] Projected withholding taxes Disposal Group, Including Discontinued Operation, Withholding taxes Disposal Group, Including Discontinued Operation, Withholding taxes ABL revolving facility Long-Term Debt, Excluding Current Maturities ACCOUNTS AND OTHER RECEIVABLES Financing Receivables [Text Block] INCOME TAXES Income Tax Disclosure [Text Block] Accumulated other comprehensive income (loss): Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Earnings (loss) per share: Earnings Per Share [Abstract] Schedule of Net Sales by Product Group Revenue from External Customers by Products and Services [Table Text Block] Raw materials Inventory, Raw Materials, Net of Reserves Retained earnings Retained Earnings (Accumulated Deficit) Cash Dominion Period availability Line Of Credit, Cash Dominion Period, Percentage Threshold Line Of Credit, Cash Dominion Period, Percentage Threshold Amounts of unrealized after-tax gains on derivative instruments Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Inventories Increase (Decrease) in Inventories Miscellaneous accrued expenses Disposal Group, Including Discontinued Operation, miscellaneous accrued expenses Disposal Group, Including Discontinued Operation, miscellaneous accrued expenses Debt principal payments Repayments of Long-Term Lines of Credit Common stock held in trust for savings restoration plan (118,543 shares at June 30, 2025 and December 31, 2024) Common Stock, Held-in-Trust Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Credit Facility [Axis] Credit Facility [Axis] Amendment Flag Amendment Flag Expected required contributions Defined Benefit Plan Estimated Required Future Employer Contributions In Current Fiscal Year Defined benefit plan estimated required future employer contributions in current fiscal year. Entity Registrant Name Entity Registrant Name Foreign currency translation adjustment Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax 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] Machinery & equipment Machinery and Equipment [Member] Fair Value as of Grant Date Award Grant Date Fair Value Schedule of Identifiable Assets Reconciliation of Assets from Segment to Consolidated [Table Text Block] DEBT Debt Disclosure [Text Block] Segment, Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Common stock, no par value (authorized shares 150,000,000, issued and outstanding 34,876,616 shares at June 30, 2025 and 34,661,272 shares at December 31, 2024) Common Stock, Value, Issued Proceeds from the sale of assets Proceeds from Sale of Other Assets, Investing Activities Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Other assets Other Noncurrent Assets [Member] 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] Income tax (expense) benefit Reclassification from AOCI, Current Period, Tax Freight Disposal Group, Including Discontinued Operation, Freight Disposal Group, Including Discontinued Operation, Freight Cash flows from 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] Basic earnings (loss) per share (in dollars per share) 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] Derivative financial instruments adjustment Other Comprehensive Income (Loss), Derivative Financial Instruments Adjustment Other Comprehensive Income (Loss), Derivative Financial Instruments Adjustment Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] 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] Total assets Total Assets Stock-based compensation expense Share Based Compensation Expense, Value Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, stock options, restricted stock or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Cost of goods and services sold Add back freight Cost of Goods and Services Sold Common stock shares held in trust for savings restoration plan (in shares) Common Stock, Shares Held in Employee Trust, Shares Income taxes recoverable Income Taxes Receivable, Current Capital expenditures Capital expenditures Payments to Acquire Property, Plant, and Equipment Total Disposal Group, Including Discontinued Operation, Operating Expense Other non-current liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Liabilities Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities [Abstract] Property, plant, and equipment component threshold, percentage of borrowing base Debt Instrument, Borrowing Base Calculation, Property Plant And Equipment Component Threshold, Percentage Of Borrowing Base Debt Instrument, Borrowing Base Calculation, Property Plant And Equipment Component Threshold, Percentage Of Borrowing Base Interest expense Interest and Debt Expense Guangzhou Tredegar Loan Guangzhou Tredegar Loan [Member] Guangzhou Tredegar Loan Termination Date Trading Arrangement Termination Date Revenues Revenues Selling, general and administrative costs Selling, general and administrative costs (e) Selling, general and administrative costs (e) Property, plant, and equipment component threshold, percentage of net orderly liquidation value Debt Instrument, Borrowing Base Calculation, Property Plant And Equipment Component Threshold, Percentage Of Net Orderly Liquidation Value Debt Instrument, Borrowing Base Calculation, Property Plant And Equipment Component Threshold, Percentage Of Net Orderly Liquidation Value Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Net income (loss) Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Fixed Charge Coverage Ratio Fixed Charge Coverage Ratio [Member] Fixed Charge Coverage Ratio ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Term Secured Overnight Financing Rate Term Secured Overnight Financing Rate [Member] Term Secured Overnight Financing Rate Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Subtotal Aluminum Extrusions Subtotal [Member] Aluminum Extrusions Subtotal [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] Severance Disposal Group, Including Discontinued Operation, Severance Disposal Group, Including Discontinued Operation, Severance Entity File Number Entity File Number Investing activities: Discontinued Operation, Additional Disclosures [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus Segment Reporting, Revenue from External Customer, Product and Service [Table] Segment Reporting, Revenue from External Customer, Product and Service [Table] Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Other comprehensive income (loss) OCI, before Reclassifications, before Tax, Attributable to Parent Trust for Savings Restoration Plan Trust For Saving Restoration Plan [Member] Trust For Saving Restoration Plan. Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Name Forgone Recovery, Individual Name Document Period End Date Document Period End Date Finished goods Inventory, Finished Goods, Net of Reserves Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Base Rate Base Rate [Member] Insider Trading Arrangements [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Asset impairments and costs associated with exit and disposal activities, net of adjustments Asset Impairment And Costs Associated With Exit And Disposal Activities - impairment Line Amounts charged against earnings for incurred and estimated one-time, nonrecurring costs assoicated with asset impariments and exit and disposal activities. Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Derivative financial instruments adjustment (net of tax expense of $171 in 2025 and net of tax benefit of $253 in 2024) Other Comprehensive Income (Loss), Derivative Financial Instruments Adjustment, Net of Tax Other Comprehensive Income (Loss), Derivative Financial Instruments Adjustment, Net of Tax PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Continuing operations (in usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Adjustment to Compensation: Adjustment to Compensation [Axis] Prepaid expenses and other Prepaid Expense and Other Assets, Current Accrued expenses Accrued Expenses [Member] Accrued Expenses [Member] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Schedule of Components of Net Periodic Benefit Cost for Pension and Other Post-Retirement Benefit Programs Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block] Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block] Latin America Latin America [Member] Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (effective portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Basic (in shares) Weighted average shares outstanding used to compute basic earnings per share Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] ≤ 33% of $125 million aggregate commitment less than 33% of $125 million aggregate commitment [Member] less than 33% of $125 million aggregate commitment Nonresidential building & construction Nonresidential Building And Construction [Member] Nonresidential Building And Construction [Member] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Amended ABL Facility Amended ABL Facility [Member] Amended ABL Facility Name Awards Close in Time to MNPI Disclosures, Individual Name Amended ABL Facility If Average Usage Is Greater Than Or Equal To 50% Amended ABL Facility If Average Usage Is Greater Than Or Equal To 50% [Member] Amended ABL Facility If Average Usage Is Greater Than Or Equal To 50% Commitment fee percentage threshold Line of Credit Facility, Unused Capacity, Commitment Fee Percentage, Threshold Line of Credit Facility, Unused Capacity, Commitment Fee Percentage, Threshold Entity Filer Category Entity Filer Category Reclassification adjustment to net income (loss), net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Operating activities: Net Cash Provided by (Used in) Discontinued Operations [Abstract] Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Costs and expenses: Cost of Revenue [Abstract] Company Selected Measure Name Company Selected Measure Name