Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Amount other PRPs will pay to fund cleanup Site Contingency, Properties Loss Exposure Not Accrued, Best Estimate Best estimate of the properties loss exposure around the refinery site, for reasonably possible environmental contingencies for which no accrual has been recorded. Trading Arrangement: Trading Arrangement [Axis] Maximum 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 current liability: gain positions Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Attributable to unconsolidated affiliates, net of tax of $221, $(604), $296, and $213 Other Comprehensive Income (Loss), Attributable to unconsolidated affiliates net of tax, Including Portion Attributable to Noncontrolling Interest Amount of increase (decrease) in other comprehensive income, after tax, from changes classified as attributable to unconsolidated affiliates, Including Portion Attributable to Noncontrolling Interest. Segment Reporting [Abstract] Segment Reporting [Abstract] Common stock - $.01 par value; shares authorized 500,000,000 in 2026 and 250,000,000 in 2025; issued 320,732,016; outstanding 110,562,284 in 2026 and 222,359,500 in 2025 Common Stock, Value, Issued Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table] Accrued wages and other employee costs Employee-related Liabilities, Current Southland Pipe Nipples Co., Inc. Southland Pipe Nipples Co., Inc. [Member] Southland Pipe Nipples Co., Inc. Benefit Plans Retirement Benefits [Text Block] Reserve for settlement Loss Contingency Accrual Payments required to be made under guarantees, maximum Guarantor Obligations, Maximum Exposure, Undiscounted Restatement Determination Date Restatement Determination Date Investments in unconsolidated affiliates Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Derivative Instrument [Axis] Derivative Instrument [Axis] Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Disposal Group Classification [Axis] Disposal Group Classification [Axis] Time period for open copper future contract purchases Time period for open copper future contract Period related to fixed price sales orders of open future contract. Property, plant, and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Loss (gain) on disposal of assets, net Gain (Loss) on Disposition of Other Assets Term of guarantees Term of guarantees Represents the term of guarantees. Loss Contingencies [Table] Loss Contingencies [Table] Deferred net gains, net of tax, included in AOCI Deferred net gains (losses), net of tax, included in AOCI Accumulated change, net of tax, in accumulated gains and losses from derivative instruments. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. Other comprehensive (loss) income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Entity Address, State or Province Entity Address, State or Province Insured event, gain (loss), pretax Insured Event, Gain (Loss), Pretax Insured Event, Gain (Loss), Pretax PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Foreign currency translation Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Amount reclassified from AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Expenditures for long-lived assets (including those resulting from business acquisitions) Segment Reporting, Long-Lived Asset, Expenditure for Addition Asset Acquisition [Axis] Asset Acquisition [Axis] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Site contingency, additional reimbursement of past costs Site Contingency, Additional Reimbursement Costs To Third Parties For Past Costs Site Contingency, Additional Reimbursement Costs To Third Parties For Past Costs Weighted average shares for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Components of net periodic benefit cost (income) [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Number of properties in remediation Number of Properties in Remediation Number of Properties in Remediation Entity Address, City or Town Entity Address, City or Town Open option contracts written, at fair value Derivative, Fair Value, Net Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Carrying value of the Assets disposed Disposal Group, Including Discontinued Operation, Assets Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Total other comprehensive (loss) income, net Total other comprehensive (loss) income attributable to Mueller Industries, Inc. Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Insurance proceeds - capital related Proceeds from Insurance Settlement, Investing Activities Insured event, gain (loss) after tax, diluted impact (in dollars per share) Insured Event, Gain (Loss) after Tax, Impact per Diluted Share Insured Event, Gain (Loss) after Tax, Impact per Diluted Share Net change with respect to derivative instruments and hedging activities, net of tax of $(333), $384, $251, and $(210) Gain (Loss) Recognized in AOCI (Effective Portion), Net of Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Other current liabilities Business Combination, Recognized Liability Assumed, Other Liability, Current Schedule of Segment Information Segment Reporting [Table Text Block] Noncontrolling Interest Noncontrolling Interest [Member] Loss (gain) on disposals of assets, net Gain (Loss) on Disposition of Property Plant Equipment Lead Refinery NPL Site Lead Refinery NPL Site [Member] Lead Refinery NPL Site [Member] Net change in pension and postretirement obligation adjustments, tax benefit (expense) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Document Period End Date Document Period End Date Changes in assets and liabilities, net of effects of businesses acquired and sold: 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] Restricted cash in other current assets as collateral related to open derivative contracts Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Security Exchange Name Security Exchange Name Number of parties involved in settlement negotiations Number of Parties Involved in Settlement Negotiations Number of parties involved in settlement negotiations. Treasury common stock, at cost Treasury Stock, Common, Value Insurance Claim Insurance Disclosure [Text Block] Position [Axis] Position [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Current portion of operating lease liabilities Operating Lease, Liability, Current Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Earnings per Common Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Disaggregation of Revenue From Contracts with Customers Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Lead Refinery Site Lead Refinery Site [Member] Lead Refinery Site. 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] Site contingency, total costs Site Contingency, Total Cost For All Parties, Best Estimate Site Contingency, Total Cost For All Parties, Best Estimate Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Schedule of Preliminary Purchase Price Allocation Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name EPA review, term EPA Review, Term EPA Review, Term Dividends paid to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Schedule of Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Proceeds from sale of business, net of cash sold Proceeds from Divestiture of Businesses, Net of Cash Divested Cash on hand used for asset acquisition Payments for Asset Acquisitions Payments for Asset Acquisitions Pension/OPEB Liability Adjustment Amortization of net (gain) loss and prior service (credit) cost on employee benefit plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Adjusted weighted average shares for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] 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] Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Operating income of disposed business Income (Loss) from Individually Significant Component Disposed of or Held-for-Sale, Excluding Discontinued Operations, before Income Tax Dividends paid or payable to stockholders of Mueller Industries, Inc. Dividends Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] United States Department of Commerce Antidumping Review Unfavorable Regulatory Action [Member] Other current liability: loss positions Derivative Liability, Subject to Master Netting Arrangement, before Offset Effect of dilutive stock-based awards (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Effective tax rate Effective Income Tax Rate Reconciliation, Percent All Executive Categories All Executive Categories [Member] Issuance of shares under incentive stock plans Stock Repurchased and Retired During Period, Value Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Dividends from unconsolidated affiliates Proceeds from Dividends Received Distribution expense Production and Distribution Costs Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Schedule of Components of Net Periodic Benefit Cost (Income) Schedule of Net Benefit Costs [Table Text Block] Depreciation and amortization Depreciation Asset Acquisition [Domain] Asset Acquisition [Domain] Bonita Peak Mining District Bonita Peak Mining District [Member] Bonita Peak Mining District Number of surrounding properties Number of surrounding properties Number of properties surrounding the Lead Refinery site. Number of PRPs Site Contingency, Number Of Potentially Responsible Parties Site Contingency, Number Of Potentially Responsible Parties Sales and marketing expense Selling and Marketing Expense Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Shasta Area Mine Sites Shasta Area Mine Sites [Member] Shasta Area Mine Sites. Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Tax-deductible goodwill and intangible assets Business Combination, Goodwill, Expected Tax Deductible, Amount and Intangible Assets Business Combination, Goodwill, Expected Tax Deductible, Amount and Intangible Assets Net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Industrial Metals Industrial Metals [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. Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Dividends paid to stockholders of Mueller Industries, Inc. Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Liabilities Liabilities [Abstract] Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of former smelter sites Number of Former Smelter Sites Number of Former Smelter Sites Total equity Balance at beginning of period Balance at end of period 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] Business Combination [Line Items] Business Combination [Line Items] Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] 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] Exercise Price Award Exercise Price Piping Systems Piping Systems [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. Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report 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] Disposal Group, Disposed of Other than by Sale, Not Discontinued Operation, Exchange Disposal Group, Disposed of Other than by Sale, Not Discontinued Operation, Exchange [Member] Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Repayments of debt Repayments of Long-Term Debt OEM components, tube and assemblies OEM components, tube and assemblies [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. Disposal Group Classification [Domain] Disposal Group Classification [Domain] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Business Combination [Table] Business Combination [Table] Acquisitions and Dispositions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Financial guarantee Site Contingency, Environmental Remedial and Feasibility Study, Financial Guarantee Site Contingency, Environmental Remedial and Feasibility Study, Financial Guarantee Adoption Date Trading Arrangement Adoption Date Consideration received, net of working capital adjustment Disposal Group, Including Discontinued Operation, Consideration Total Mueller Industries, Inc. stockholders' equity Equity, Attributable to Parent Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] 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 Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Environmental Remediation Site [Axis] Environmental Remediation Site [Axis] Insider Trading Policies and Procedures [Line Items] Other Proceeds from (Payment for) Other Financing Activity Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Deferred income tax expense Deferred Income Tax Expense (Benefit) Selling, general, and administrative expense Selling, General and Administrative Expense Business Combination [Domain] Business Combination [Domain] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Transactions with noncontrolling interests Noncontrolling Interest, Increase from Subsidiary Equity Issuance Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate expenses Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination [Axis] Business Combination [Axis] Equity [Abstract] Equity [Abstract] 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] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Carrying value of the liabilities disposed Disposal Group, Including Discontinued Operation, Liabilities Other comprehensive (loss) income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Mueller Industries, Inc. stockholders' equity: Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Unrealized gains on short-term investments Unrealized gains (losses) on short-term investments Gain (Loss) on Investments Investment, Name [Axis] Investment, Name [Axis] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Intersegment sales Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Other current assets Business Combination, Recognized Asset Acquired, Other Asset, Current Attributable to Unconsol. Affiliates Accumulated Other Comprehensive Income Attributable to Unconsolidated Affiliates [Member] Accumulated Other Comprehensive Income Attributable to Unconsolidated Affiliates [Member] City Area Code City Area Code Open future contracts to sell copper Open Option Contracts Put, at Fair Value The fair value of the open option contracts Put for the investment. Accumulated other comprehensive loss Total AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Pension liabilities Liability, Defined Benefit Pension Plan, Noncurrent Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Valves and plumbing specialties Valves and plumbing specialties [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. Statement [Line Items] Statement [Line Items] Total assets Segment assets Assets Entity [Domain] Entity [Domain] Environmental reserves Accrual for Environmental Loss Contingencies Amortization of prior service credit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Operating Segments Operating Segments [Member] Interest expense Interest Expense, Nonoperating Net sales of disposed of business Disposal Group, Including Discontinued Operation, Revenue Total liabilities assumed Business Combination, Recognized Liability Assumed, Liability Other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Other current assets: loss positions Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Other noncurrent liabilities Other Liabilities, Noncurrent Goodwill, net Goodwill Retirement Plan Type [Axis] Retirement Plan Type [Axis] Inventories Business Combination, Recognized Asset Acquired, Inventory, Current Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Geographic boundary of sites Geographic Boundary Of Sites Geographic Boundary Of Sites Accounts payable Business Combination, Recognized Liability Assumed, Accounts Payable, Current Retained Earnings Retained Earnings [Member] Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Cumulative Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Other Other Contract [Member] Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Net change with respect to derivative instruments and hedging activities, tax (expense) benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Cash Flow Hedging Cash Flow Hedging [Member] Unrealized gains on short-term investments Unrealized Gain (Loss) on Investments Reconciliation of consolidated net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Total assets acquired Business Combination, Recognized Asset Acquired, Asset Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Property, plant, and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Net sales Revenue from Contract with Customer, Excluding Assessed Tax Interest cost Defined Benefit Plan, Interest Cost Total derivative assets Derivative Asset Inventories Inventory Disclosure [Text Block] Repurchase of common stock Stock Repurchased During Period, Value Exercise of stock options, net of shares withheld Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Number of UAOs Site Contingency, Number Of Unilateral Administrative Orders Site Contingency, Number Of Unilateral Administrative Orders Underlying Securities Award Underlying Securities Amount Purchase of short-term investments Payments to Acquire Short-Term Investments Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Current liabilities Increase (Decrease) in Other Current Liabilities Other Payment for (Proceeds from) Other Investing Activity Inventories Increase (Decrease) in Inventories Brass rod, forgings, wire and cable Brass rod and forgings [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. Provision for state income taxes, net of federal benefits Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Segment Reporting [Table] Segment Reporting [Table] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Other current assets Other Assets, Current Estimated remediation costs Environmental Exit Costs, Reasonably Possible Additional Loss Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Corporate expenses Operating Income (Loss) Flex duct and other HVAC components Flex Duct and Other HVAC Components [Member] Flex Duct and Other HVAC Components Current Fiscal Year End Date Current Fiscal Year End Date Gain on sale of business Gain on sale of business Pre tax gain of sale of business Gain on sale of business Gain (Loss) on Disposition of Business Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Tecumseh Products Holdings LLC Tecumseh Products Holdings LLC [Member] Refers to joint venture entity Tecumseh Products Holdings LLC to accomplish a mutually beneficial venture or project. Derivative [Line Items] Derivative [Line Items] 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 (in dollars 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] Service cost Defined Benefit Plan, Service Cost Dividends paid to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders CD OpCo Holdings, LLC CD OpCo Holdings, LLC [Member] CD OpCo Holdings, LLC Asset impairments Impairment charges Asset impairments Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Investments in Unconsolidated Affiliates Equity Method Investments and Joint Ventures Disclosure [Text Block] Finished goods Inventory, Finished Goods, Gross Period of permit, implementation of best management practices Period of permit, implementation of Best Management Practices The period of permit for the continued implementation of Best Management Practices. Environmental reserves Accrued Environmental Loss Contingencies, Noncurrent Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Cost of goods sold Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Equity Components [Axis] Equity Components [Axis] Receivables Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Entity Interactive Data Current Entity Interactive Data Current Net income attributable to noncontrolling interests Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Gain on commodity contracts (nonqualifying) Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Entity Small Business Entity Small Business Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Comprehensive income attributable to Mueller Industries, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Insurance proceeds - noncapital related Proceeds from Insurance Premiums Collected Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Net change in pension and postretirement obligation adjustments, net of tax of $6, $114, $(34), and $(708) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Stock split conversion ratio Stock split ratio, common stock Stockholders' Equity Note, Stock Split, Conversion Ratio MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other assets Other Assets, Noncurrent Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Acquisition of business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Fair Value as of Grant Date Award Grant Date Fair Value Short Short [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Other Benefits Other Postretirement Benefits Plan [Member] Work-in-process Inventory, Work in Process, Gross Segment operating income Operating Income (Loss), Excluding Corporate Operating Income (Loss), Excluding Corporate Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Stock split, shares issued for each outstanding share (in shares) Stockholders' Equity Note, Stock Split, Conversion Ratio, Shares Issued for Each Outstanding Share Stockholders' Equity Note, Stock Split, Conversion Ratio, Shares Issued for Each Outstanding Share Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Estimated remediation costs, term Site Contingency, Estimated Time Frame to Resolve Contingency 1 Estimated time frame for resolution of the uncertainty as to the loss for an individual site. Commitments and contingencies Commitments and Contingencies Fair value of future contracts with net gain position Gain (Loss) on Fair Value of Future Contracts Refers to gain (loss) position on fair value of future contracts. Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Income from unconsolidated affiliates, net of foreign tax Income from unconsolidated affiliates Income (Loss) from Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Inventories Inventories Inventory, Net All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Purchase of long-term investments Payments to Acquire Long-Term Investments Gain Reclassified from AOCI (Effective Portion), Net of Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax PEO Name PEO Name Unrealized Gain (Loss) on Derivatives Unrealized gains on derivative commodity contracts Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Number of mining sites Number of Mining Sites Number of Mining Sites Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Other segment items Segment Reporting, Other Segment Item, Amount Southeast Kansas Sites Southeast Kansas Sites [Member] Smelting sites in Southeast Kansas. Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Sherwood Valve LLC Sherwood Valve LLC [Member] Sherwood Valve LLC Cash, cash equivalents, and restricted cash at the beginning of the period Cash, cash equivalents, and restricted cash at the end of the period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation 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] Schedule of Reclassification Adjustments Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Restricted cash included within other current assets Restricted Cash and Cash Equivalent, 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] Gain on insurance proceeds Gain on insurance proceeds Insured Event, Gain (Loss) Consolidated comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Interest in the joint venture, ownership percentage Equity Method Investment, Ownership Percentage Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Long Long [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Schedule of Derivative Instruments Designated as Cash Flow Hedges Reflected in the Financial Statements Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic earnings per share (in dollars per share) Earnings Per Share, Basic Proceeds from insurance settlement received Proceeds from Insurance Settlement, Operating Activities Repurchase of common stock Payments for Repurchase of Common Stock Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Schedule of Activities Related to Derivative Instruments Classified as Cash Flow Hedges Derivative Instruments, Gain (Loss) [Table Text Block] Long-term debt, less current portion Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Site contingency, amount agreed upon to pay PRPs for past costs Site Contingency, Reimbursement Costs To Third Parties For Past Costs Site Contingency, Reimbursement Costs To Third Parties For Past Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, less allowance for credit losses of $3,608 in 2026 and $2,545 in 2025 Accounts Receivable, after Allowance for Credit Loss, Current Duties and interest sought from third party after protests denied Duties and Interest Sought after Protests Denied Duties and Interest Sought after Protests Denied Retained earnings Retained Earnings (Accumulated Deficit) Commodity contracts Commodity Contract [Member] Product and Service [Axis] Product and Service [Axis] 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 Benefits Pension Plan [Member] Common Stock Common Stock [Member] Gain (loss) on disposal of businesses Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Long-term debt Business Combination, Recognized Liability Assumed, Long-Term Debt, Current Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Insurance [Abstract] Mueller Copper Tube Products, Inc. Mueller Copper Tube Products, Inc. [Member] Mueller Copper Tube Products, Inc. Derivative Contract [Domain] Derivative Contract [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Attributable to unconsolidated affiliates, tax benefit (expense) Other Comprehensive Income (Loss), Attributable to unconsolidated affiliates, tax Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from changes classified as attributable to unconsolidated affiliates. Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Schedule of Fair Value Hedges Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Contingency charge Loss Contingency Accrual, Loss (Reversal of Loss) Restricted cash included within other assets Restricted Cash and Cash Equivalent, Noncurrent Additional paid-in capital Additional Paid in Capital Other liabilities Increase (Decrease) in Other Noncurrent Liabilities Other expense, net Other expense, net Other Nonoperating Income (Expense) Manufacturing costs Manufacturing Costs Name Awards Close in Time to MNPI Disclosures, Individual Name Equity Equity, Including Portion Attributable to Noncontrolling Interest [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] Accrual for environmental loss contingencies, gross Accrual for Environmental Loss Contingencies, Gross Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Raw materials and supplies Inventory, Raw Materials and Supplies, Gross Preferred stock - $1.00 par value; shares authorized 5,000,000; none outstanding Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Amounts reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Assignment of antidumping duty rate on U.S. imports by Company subsidiaries (as a percent) Assignment of antidumping duty rate on U.S. imports by Company subsidiaries Antidumping fees imposed on certain subsidiaries of the entity. Hedging Designation [Domain] Hedging Designation [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Number of import entries Number of Import Entries Refers to import entries made during the period. Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Valuation reserves Inventory Adjustments Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Chicago Extruded Metals Chicago Extruded Metals [Member] Chicago Extruded Metals Net cash used to settle stock-based awards Payments For Settlement of Stock Based Awards Payments For Settlement of Stock Based Awards Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Consideration transferred net of working capital adjustments Business Combination, Consideration Transferred Retirement Plan Type [Domain] Retirement Plan Type [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Other items Effective Income Tax Rate Reconciliation, Other Items, Amount Effective Income Tax Rate Reconciliation, Other Items, Amount Name Trading Arrangement, Individual Name Cash and cash equivalents Cash & cash equivalents Cash and Cash Equivalent Position [Domain] Position [Domain] Retail Distribution Business Retail Distribution Business [Member] Retail Distribution Business Company Selected Measure Amount Company Selected Measure Amount Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Cash, Cash Equivalents, and Restricted Cash Cash and Cash Equivalents Disclosure [Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Consolidated net income Consolidated net income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Total derivative liabilities Derivative Liability Non operating Properties Non operating Properties [Member] Non-operating properties. Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income tax expense Income Tax Expense (Benefit) Fair Value Hedging Fair Value Hedging [Member] Cost of goods sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Increase (decrease) in cash, cash equivalents, and restricted cash 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] Amortization of net (loss) gain Defined Benefit Plan, Amortization of Gain (Loss) Recently Issued Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Changes in accumulated other comprehensive income [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Tube and fittings Tube and fittings [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. Net income attributable to Mueller Industries, Inc. Net income attributable to Mueller Industries, Inc. Net of tax and noncontrolling interests Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Proceeds from sales of assets Proceeds from Sale of Property, Plant, and Equipment Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Environmental Remediation Site [Domain] Environmental Remediation Site [Domain] Bison Metals Technologies LLC Bison Metals Technologies LLC [Member] Bison Metals Technologies LLC Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Changes in AOCI by Component, Net of Taxes and Noncontrolling Interest Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Issuance of restricted stock Shares withheld for stock option exercises and employee taxes Stock Issued During Period, Value, Restricted Stock Award, Gross Interest income Interest income Investment Income, Interest Litigation settlement Litigation Settlement, Amount Awarded to Other Party Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Other current assets: gain positions Derivative Asset, Subject to Master Netting Arrangement, before Offset Operating Properties Operating Properties [Member] Operating Properties [Member] Climate Climate [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. Other Other 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. Southeast Kansas Sites - Lanyon Southeast Kansas Sites - Lanyon [Member] Southeast Kansas Sites - Lanyon Postretirement benefits other than pensions Liability, Other Postretirement Defined Benefit Plan, Noncurrent Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]