Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Title of 12(b) Security Title of 12(b) Security Carrying Value Reported Value Measurement [Member] Discontinued operation, additional consideration, contingent on performance measures Disposal Group, Including Discontinued Operation, Additional Consideration Disposal Group, Including Discontinued Operation, Additional Consideration Document Fiscal Year Focus Document Fiscal Year Focus Weighted average interest rate (as a percent) Debt, Weighted Average Interest Rate Repurchase and retirement of common stock to offset the dilutive impact of the grant of long-term stock awards (in shares) Stock Repurchased and Retired During Period To Offset Dilutive Impact Of Long Term Stock Awards, Shares Number of shares that have been repurchased and retired during the period to offset the dilutive impact of the grant of long-term stock awards. Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Segment Reporting [Abstract] Common shares, par value $1 per share Authorized shares: 1,400,000,000; Issued and outstanding: 2026 – 192,800,000; 2025 – 204,300,000 Common Stock, Value, Issued Employee withholding taxes paid on stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Divestitures Goodwill, Divestiture Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Goodwill and Other Intangible Assets Goodwill [Line Items] Current liabilities: Liabilities, Current [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gain Contingencies, Nature [Axis] Gain Contingencies, Nature [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Other comprehensive income (loss), 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] Other, net (including currency translation and divestitures) Standard Product Warranty Accrual, Foreign Currency Translation Gain (Loss) CASH AND CASH INVESTMENTS: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation [Abstract] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Common shares, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Property Additions Segment Reporting, Long-Lived Asset, Expenditure for Addition Other intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Basic common shares (based upon weighted average) (in shares) Weighted Average Number of Shares Outstanding, Basic 2026 Credit Agreement 2026 Credit Agreement [Member] 2026 Credit Agreement Accumulated Impairment Losses Reduction to goodwill accumulated impairment loss Goodwill, Impaired, Accumulated Impairment Loss Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Total current liabilities Liabilities, Current Work in process Inventory, Work in Process, Net of Reserves Entity Address, City or Town Entity Address, City or Town Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Carrying value of definite-lived intangible assets Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net of accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Borrowing capacity, maximum Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Write-offs charged against the allowance Financing Receivable, Allowance for Credit Loss, Writeoff Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Information by Segment and Property Additions, Depreciation and Amortization and Assets Segment Reporting [Table Text Block] Noncontrolling Interest Noncontrolling Interest [Member] Other comprehensive income (loss) attributable to Masco Corporation Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Document Period End Date Document Period End Date Number of reportable segments not disclosed flag Number Of Reportable Segments Disclosed By Definition Flag Number Of Reportable Segments Disclosed By Definition Flag Net cash for 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] Preferred shares, shares outstanding (in shares) Preferred Stock, Shares Outstanding Senior unsecured term loan Debt Instrument, Face Amount Basic: Earnings Per Share, Basic [Abstract] Security Exchange Name Security Exchange Name Debt instrument, term (in years) Debt Instrument, Term SUPPLIER FINANCE PROGRAM Supplier Finance Program [Text Block] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Schedule of Changes in the Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] INCOME PER COMMON SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Settlements made (in cash or kind) during the period Standard Product Warranty Accrual, Decrease for Payments Income per common share attributable to Masco Corporation: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Schedule of Weighted Average Diluted Common Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Extension period (in years) Line of Credit Facility, Maturity Date, Extension Period Line of Credit Facility, Maturity Date, Extension Period Geographical [Domain] Geographical [Domain] Other indefinite-lived intangible assets Intangible Asset, Excluding Goodwill, Indefinite-Lived Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Dividends paid to noncontrolling interest Payments of Ordinary Dividends, Noncontrolling Interest Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Diluted: Earnings Per Share, Diluted [Abstract] Proceeds from disposition of business, net of cash disposed Proceeds from Divestiture of Businesses, Net of Cash Divested Credit Facility [Domain] Credit Facility [Domain] CASH FLOWS FROM (FOR) OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Cash dividends per common share paid (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Gross profit Gross Profit Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Outstanding and unused letters of credit Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Proceeds from term loan Proceeds from Issuance of Unsecured Debt Effective tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Add: Dilutive effect of stock options and other stock-based incentives (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Repurchased Stock Repurchased and Retired During Period, Value Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Schedule of Reconciliations of the Numerators and Denominators, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] SEGMENT INFORMATION Segment Reporting [Text Block] Amount borrowed Long-Term Line of Credit Cash dividends paid Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Gain Contingency, Nature [Domain] Gain Contingency, Nature [Domain] Balance at January 1 Balance at end of period Standard Product Warranty Accrual Schedule of Revenue from Sales to Customers in Geographic Areas Disaggregation of Revenue [Table Text Block] LIABILITIES Liabilities [Abstract] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Effect of exchange rate changes on cash and cash investments Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Foreign Currency Translation Goodwill, Other Increase (Decrease) Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Beginning balance Ending balance 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] Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common shares, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Exercise Price Award Exercise Price CASH FLOWS FROM (FOR) INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] 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] DEBT Debt Disclosure [Text Block] 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] Equity Component [Domain] Equity Component [Domain] Surrendered (non-cash) Surrendered Non Cash Surrendered non cash. PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount IEEPA Tariff Refund IEEPA Tariff Refund [Member] IEEPA Tariff Refund Adoption Date Trading Arrangement Adoption Date Discontinued operation, consideration Disposal Group, Including Discontinued Operation, Consideration Cash dividends declared Dividends, Common Stock, Cash Total Masco Corporation's shareholders' deficit Equity, Attributable to Parent Nonoperating income (expense) Nonoperating Income (Expense) Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] ASSETS Assets [Abstract] Supplier Finance Program [Abstract] Supplier Finance Program Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Share repurchase program, authorized, number of shares (in shares) Share Repurchase Program, Authorized, Number of Shares Prepaid expenses and other Prepaid Expense and Other Assets, Current Selling, general and administrative expenses Selling, General and Administrative Expense Letters of credit Letter of Credit [Member] 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] OTHER COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of restricted stock units Restricted Stock Units (RSUs) [Member] Schedule of Goodwill and Changes in Carrying Amount of Goodwill Goodwill [Table Text Block] Gross Goodwill Decrease to goodwill, gross Goodwill, Gross Entity Central Index Key Entity Central Index Key Shares retired: Shares Retired [Abstract] Shares Retired. Notes payable Notes Payable, Current All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate expenses Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [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] Net cash from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Less: Other comprehensive (loss) income attributable to noncontrolling interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Income Statement [Abstract] Income Statement [Abstract] Masco Corporation's shareholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Increase in maximum borrowing capacity Line Of Credit Facility Increase In Maximum Borrowing Capacity Increase in maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] City Area Code City Area Code Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Long-term and short-term debt Debt Instrument, Fair Value Disclosure Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement Statement [Line Items] Total assets Assets Assets Number of performance restricted stock units Performance Restricted Stock Units [Member] Performance Restricted Stock Units Preferred shares, shares issued (in shares) Preferred Stock, Shares Issued Operating Segments Operating Segments [Member] Interest expense Interest Expense, Nonoperating Accruals for warranties issued during the period Standard Product Warranty Accrual, Increase for Warranties Issued PEO PEO [Member] Debt, long-term and short-term Debt, Long-Term and Short-Term, Combined Amount Unsecured Term Loan Unsecured Term Loan [Member] Unsecured Term Loan Repurchase and retirement of common stock (in shares) Stock Repurchased and Retired During Period, Shares Measurement Basis [Axis] Measurement Basis [Axis] Other liabilities Other Liabilities, Noncurrent Goodwill Net Goodwill Net goodwill, beginning balance Net goodwill, ending balance Reduction to net goodwill Goodwill Cash provided by operations Cash Provided By Used In Operating Activities Before Adjustments Amount of cash inflow (outflow) from operating activities before reconciling adjustments. Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Swingline loans Swing Line Loans [Member] Swing Line Loans [Member] Retained (Deficit) Earnings Retained Earnings [Member] Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Operating expenses Operating Expenses Revolver Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Common shares, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Net income (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash for financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount CASH FLOWS FROM (FOR) FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net sales Total Revenue from Contract with Customer, Excluding Assessed Tax Payment of debt Repayments of Other Long-Term Debt Balance at January 1 Balance at end of period Financing Receivable, Allowance for Credit Loss INVENTORIES Inventory Disclosure [Text Block] Stock repurchased during period Stock Repurchased During Period, Value Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] GOODWILL AND OTHER INTANGIBLE ASSETS Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Less: Total comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fair Value Estimate of Fair Value Measurement [Member] REVENUE Revenue from Contract with Customer [Text Block] Shares issued Stock Issued During Period, Value, New Issues Other, net Payment for (Proceeds from) Other Investing Activity Increase in inventories Increase (Decrease) in Inventories Excise tax paid on the purchase of common stock Payments For Repurchase Of Common Stock, Excise Tax Payments For Repurchase Of Common Stock, Excise Tax Stock repurchased during period, inclusive of excise tax Share Repurchase Program, Excise Tax Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Other income (expense), net: Other Nonoperating Income (Expense) [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 profit Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount 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] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Dividends declared to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive securities excluded from computation of earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Schedule of Changes in the Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Common shares, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Equity Components [Axis] Equity Components [Axis] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to noncontrolling interest Less: Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Total comprehensive income attributable to Masco Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date DIVESTITURES Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Pension and other post-retirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other assets Other Assets, Noncurrent Document Type Document Type Accrued liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Schedule of Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (Note K) Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Increase (decrease) in accounts payable and accrued liabilities, net Increase (Decrease) in Accounts Payable and Accrued Liabilities Net income attributable to common shareholders, diluted Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Changes in the carrying amount of goodwill Goodwill [Roll Forward] LIABILITIES and EQUITY Liabilities and Equity [Abstract] Accounts payable Supplier Finance Program, Obligation Inventories Total Inventory, Net All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Changes in the company's warranty liability Movement in Standard Product Warranty Accrual [Roll Forward] Provision for expected credit losses during the period Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) Corporate expenses General corporate expense, net Corporate Expenses Corporate Expenses PEO Name PEO Name Geographical [Axis] Geographical [Axis] Contract liability Contract with Customer, Liability Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number At January 1 At September 30 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] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Total comprehensive income Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net income (in dollars per share) Earnings Per Share, Basic Purchase of common stock Payments for Repurchase of Common Stock Total current assets Assets, Current Insider Trading Arrangements [Line Items] Long-term debt Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Bristan Group Bristan Group [Member] Bristan Group Debt financing costs Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained deficit Retained Earnings (Accumulated Deficit) 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] Common Shares ($1 par value) Common Stock [Member] Disposal group, not discontinued operation, gain (loss) on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Fair Value Measurement [Domain] Fair Value Measurement [Domain] Current obligation Supplier Finance Program, Obligation, Current Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Maximum net leverage ratio Maximum Leverage Ratio Represents maximum Leverage Ratio. International Non-US [Member] Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity Number of stock options Stock Options 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 interest Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Decorative Architectural Products Decorative Architectural Products [Member] Decorative architectural products. Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Paid-in capital Additional Paid in Capital Other, net Other Nonoperating Income (Expense) Other income (expense), net Other Operating Income (Expense), Net 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] Less: Allocation to participating securities, diluted Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Preferred shares, shares authorized (in shares) Preferred Stock, Shares Authorized Receivables Receivables, Net, Current Preferred shares authorized: 1,000,000; Issued and outstanding: 2026 and 2025 – None Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Minimum interest coverage ratio Minimum Interest Coverage Ratio Minimum Interest Coverage Ratio 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] Less: Allocation to participating securities, basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Accruals related to pre-existing warranties Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Name Trading Arrangement, Individual Name Cash and cash investments Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Plumbing Products Plumbing Products [Member] Plumbing products. Company Selected Measure Amount Company Selected Measure Amount Depreciation and Amortization Depreciation, Depletion and Amortization Net income attributable to common shareholders, basic Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One North America North America [Member] Income tax expense Income Tax Expense (Benefit) Segment operating profit Corporate And Reconciling Items [Member] Corporate And Reconciling Items Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Decrease for the period 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] Net income attributable to Masco Corporation Net income attributable to Masco Corporation Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] General corporate expense, net Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from the exercise of stock options Proceeds from Stock Options Exercised Increase in receivables Increase (Decrease) in Receivables Recoveries of amounts previously written off Financing Receivable, Allowance for Credit Loss, Recovery Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Numerator (basic and diluted): Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]