Current assets Business Combination, Recognized Asset Acquired, Asset, Current Dividends Per Share of Common Stock (in USD per share) Common Stock, Dividends, Per Share, Cash Paid Statistical Measurement [Domain] Statistical Measurement [Domain] Property, plant and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Schedule of Contractual Amounts for Derivative Contracts Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Current liabilities Business Combination, Recognized Liability Assumed, Liability, Current Award Timing Predetermined Award Timing Predetermined [Flag] Balance at beginning of year Balance at end of year Standard and Extended Product Warranty Accrual Indefinite-Lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Entity File Number Entity File Number Capital in Excess of Par Value Additional Paid-in Capital [Member] Interest Rate Swap Interest Rate Swap [Member] Tabular List, Table Tabular List [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Position [Axis] Position [Axis] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic Net Earnings Per Share of Common Stock (in USD per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Inventories, at FIFO cost Inventory, Gross Revenue Recognition Revenue from Contract with Customer [Text Block] Schedule of Segment Results Schedule of Segment Reporting Information, by Segment [Table Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Adjustment to Compensation, Amount Adjustment to Compensation Amount Leonard Value Leonard Value [Member] Leonard Value Schedule of Impaired Long-Lived Assets Held and Used [Table] Impaired Long-Lived Asset, Held and Used [Table] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Dividends on stock Dividends, Common Stock, Cash Total Stockholders’ Equity Balance at the beginning of period Balance at end of period Equity, Attributable to Parent Other comprehensive (loss) gain before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Other comprehensive (loss) earnings Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Share based compensation expense Share-Based Payment Arrangement, Expense Hedging Designation [Domain] Hedging Designation [Domain] Patents Patents [Member] Current Assets Assets, Current [Abstract] Total Liabilities and Stockholders’ Equity Liabilities and Equity Pension liability Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Acquired obligations Standard and Extended Product Warranty Accrual, Increase from Business Combination Cover [Abstract] Cover [Abstract] Reclassifications, net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Maximum Maximum [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Treasury Stock Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Liabilities Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Earnings before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Other liabilities Other Liabilities, Noncurrent Mexican peso Mexico, Pesos Trading Activity, by Type [Domain] Trading Activity, by Type [Domain] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Performance Stock Unit Activity Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Debt due within one year Long-Term Debt, Current Maturities Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Comprehensive Earnings Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Secured Debt Secured Debt [Member] Document Fiscal Period Focus Document Fiscal Period Focus Claims settled Standard and Extended Product Warranty Accrual, Decrease for Payments Award Timing Method Award Timing Method [Text Block] Payment terms Revenue From Contract With Customer, Payment Terms Revenue From Contract With Customer, Payment Terms Award Type [Axis] Award Type [Axis] Cumulative foreign currency translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Income Tax Contingency [Table] Income Tax Contingency [Table] Total Assets Assets Assets Trading Symbol Trading Symbol Vested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Expense Standard and Extended Product Warranty Accrual, Increase for Warranties Issued Geographical [Domain] Geographical [Domain] Entity Address, City or Town Entity Address, City or Town Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Weighted average useful life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Inventories Inventory Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Share Units Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding North America North America North America Segment [Member] North America Segment [Member] 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] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Performance adjustments (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Performance Adjustments, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Performance Adjustments, Weighted Average Grant Date Fair Value Water heaters and related parts Water Heaters And Related Parts [Member] WaterHeatersAndRelatedPartsMember Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Plan Name [Axis] Plan Name [Axis] Document Information [Table] Document Information [Table] PEO PEO [Member] Schedule of Net Sales Disaggregated by Segment and Major Product Line Disaggregation of Revenue [Table Text Block] Number of required financial covenants Line Of Credit Facility, Financial Covenant Required, Number Line Of Credit Facility, Financial Covenant Required, Number Assets (liabilities) measured at fair value Fair Value, Net Asset (Liability) Guarantees and Product Warranties [Abstract] Net changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Exercises of stock options Stock Issued During Period, Value, Stock Options Exercised 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] Schedule of Warranty Liability Activity Schedule of Product Warranty Liability [Table Text Block] Weighted-Average Grant Date Value Weighted-Average Grant Date Value Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Nonvested, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Nonvested, Weighted Average Exercise Price Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Retained Earnings Retained Earnings [Member] Number of Units Number of Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents - beginning of period Cash and Cash Equivalents - End of Period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Provision for income taxes Income Tax Expense (Benefit) Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Investments in marketable securities Payments to Acquire Marketable Securities Income tax provision Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Issuance of share units Adjustments To Additional Paid In Capital, Share Units Issued Adjustments To Additional Paid In Capital, Share Units Issued Document Information [Line Items] Document Information [Line Items] Other intangibles Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Unrealized gains on cash flow derivative instruments, less related income provision of $(0.4) in 2026, and $(0.3) in 2025 Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Property, plant and equipment Property, Plant and Equipment, Gross Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Notional amount Total Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of the Allocation of the Fair Value of the Assets Acquired and Liabilities Assumed at the Date of Acquisition Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Acquisitions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Acquisition of business Aggregate cash purchase price, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued liabilities Accrued Liabilities, Current Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Cash Provided by Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Debt instrument, term Debt Instrument, Term Subsequent Event Subsequent Event [Member] Cash flow hedging Cash Flow Hedging [Member] Goodwill Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Equity Components [Axis] Equity Components [Axis] Non-U.S. Non-US [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Impaired Long-Lived Assets Held and Used [Line Items] Impaired Long-Lived Assets Held and Used [Line Items] Number of reporting segments Number of Reportable Segments Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Euro Euro Member Countries, Euro Total Current Liabilities Liabilities, Current Excise tax on repurchases of common stock Excise Tax On Repurchases Of Common Stock Excise Tax On Repurchases Of Common Stock Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Current assets and liabilities Increase (Decrease) in Other Current Assets and Liabilities, Net Dividends paid Payments of Ordinary Dividends, Common Stock Other current assets Other Assets, Current Capital in excess of par value Additional Paid in Capital, Common Stock Cash Used in Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 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] Document Fiscal Year Focus Document Fiscal Year Focus Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of debt Repayments of Long-Term Debt Effective tax rate Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Product warranties Product Warranty Accrual, Noncurrent Plan Name [Domain] Plan Name [Domain] Incurred acquisition costs Business Combination, Acquisition-Related Cost, Expense Equity [Abstract] Equity [Abstract] Segment Results Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Trademarks Trademarks [Member] Product Warranties Product Warranty Disclosure [Text Block] Value of units share units granted Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period, Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period, Fair Value Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Accordion feature, higher borrowing capacity option Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Changes in Accumulated Other Comprehensive Loss by Component Comprehensive Income (Loss) Note [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Selling, general and administrative expenses Selling, General and Administrative Expense Capital expenditures Capital expenditures Payments to Acquire Productive Assets Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Other assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name 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] Finished products Inventory, Finished Goods, Gross Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Pre-tax earnings Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Customer deposits liability Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Product warranties Product Warranty Accrual, Current Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Share Based Compensation Share-Based Payment Arrangement [Text Block] Buy Long [Member] Intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Assets Assets [Abstract] Long-term debt Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commodity Futures Contracts Commodity Futures Contracts [Member] Commodity Futures Contracts [Member] Fair Value Measurements Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Stockholders’ Equity Equity, Attributable to Parent [Abstract] 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] Entity Address, Address Line One Entity Address, Address Line One Shares repurchased Treasury Stock, Value, Acquired, Cost Method Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Water Heaters Water Heaters [Member] WaterHeatersMember Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Work in process Inventory, Work in Process, Gross Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair value of derivative instruments, assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Trading Activity [Axis] Trading Activity [Axis] Effect of dilutive stock options and share units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Number of units granted (in shares) Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Document Quarterly Report Document Quarterly Report Deferred income taxes Deferred Income Taxes and Tax Credits Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Granted (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Issuance of share based compensation Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Position [Domain] Position [Domain] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] All Currencies [Domain] All Currencies [Domain] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Amount of gain (loss) recognized in other comprehensive loss on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt instrument, face amount Debt Instrument, Face Amount Income tax provision on adjustment to pension liability Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Foreign currency contracts Foreign Exchange Contract [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Performance adjustments (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Performance Adjustments Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Performance Adjustments China CHINA MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Beginning balance (in USD per share) Ending balance (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Potential payouts range Share-based Compensation Arrangement By Share-based Payment Award, Potential Payout, Percent Of Target Awards Share-based Compensation Arrangement By Share-based Payment Award, Potential Payout, Percent Of Target Awards Escrow deposit Escrow Deposit Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Trading Activity, Gains and Losses, Net [Line Items] Trading Activity, Gains and Losses, Net [Line Items] Trading Activities, Gain and Losses, by Type, by Income Statement Location [Table] Trading Activity, Gain (Loss) [Table] Conversion of Class A Common Stock Stock Issued During Period, Value, Conversion of Convertible Securities Share based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock at cost Treasury Stock, Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Segments [Domain] Segments [Domain] Performance Stock Units Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Inventories Inventories, at LIFO cost Inventory, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Company Selected Measure Name Company Selected Measure Name Noncurrent assets and liabilities Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Common Stock, value Common Stock, Value, Issued Total assets acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Including Goodwill Business combination recognized identifiable assets acquired and liabilities assumed assets including goodwill. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Denominator for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Net payments from stock option activity Payments For (Proceeds From) Stock Options Activity The cash outflow (inflow) associated with the amount received from holders exercising their stock options. This item is net of cash paid by the employer to a taxing authority when shares are directly withheld for employee income tax purposes. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Finite-lived intangibles Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination Business Combination [Axis] Entity Small Business Entity Small Business Percentage of ownership interest acquired Business Combination, Voting Equity Interest Acquired, Percentage Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Schedule of Share Unit Activity Schedule of Nonvested Share Activity [Table Text Block] Interest rate derivative liabilities, at fair value Interest Rate Derivative Liabilities, at Fair Value Debt Long-Term Debt [Text Block] Document Transition Report Document Transition Report Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Boilers, related parts, and components Boilers, Related Parts, And Components [Member] Boilers, Related Parts, And Components Member Income Taxes Income Tax Disclosure [Text Block] Class A Common Stock Common Class A [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Scenario [Axis] Scenario [Axis] Document Type Document Type Earnings per Share of Common Stock Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Adjustment to pension liability, less related income tax provision of $0.0 in 2026 and $0.0 2025 Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Product and Service [Axis] Product and Service [Axis] Amount of gain (loss) reclassified from accumulated other comprehensive loss into earnings Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Net Investment Hedges Net Investment Hedging [Member] Derivative Contract [Domain] Derivative Contract [Domain] Vesting of share units Vesting Of Share Units Value of share units vested in the period. Net sales Total Net Sales Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Total Current Assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] 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] Derivative, fixed interest rate Derivative, Fixed Interest Rate Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Marketable securities Marketable Securities, Current Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Current Liabilities Liabilities, Current [Abstract] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Geographical [Axis] Geographical [Axis] Schedule of Effect of Derivatives on the Statement of Earnings Derivative Instruments, Gain (Loss) [Table Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Diluted Net Earnings Per Share of Common Stock (in USD per share) Earnings Per Share, Diluted Forecast Forecast [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Reclassification period for effective portion of contract, in years Reclassification Period For Effective Portion Of Contract Reclassification period for effective portion of contract. Gross profit Gross Profit Number of wholesale distributors (more than) Number Of Wholesale Distributors Number of Wholesale Distributors A.O. Smith Combined Compensation Plan A- O- Smith Combined Compensation Plan [Member] A.O.Smith Combined Compensation Plan [Member] Award Timing Disclosures [Line Items] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Accrued payroll and benefits Employee-related Liabilities, Current Debt instrument, interest rate during period Debt Instrument, Interest Rate During Period Net Earnings Net earnings Net earnings Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Inter-segment sales Inter-segment Elimination Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Net property, plant and equipment Property, Plant and Equipment, Net Restructuring charges Restructuring Charges Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Common stock repurchases Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Water treatment products and related parts Water Treatment Products And Related Parts [Member] WaterTreatmentProductsMember Entity Current Reporting Status Entity Current Reporting Status Derivative [Line Items] Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Earnings Operating Income (Loss) Customer Relationships Customer Relationships [Member] Line of Credit Line of Credit [Member] LIFO reserve Inventory, LIFO Reserve Retained earnings Retained Earnings (Accumulated Deficit) Adjustments to reconcile net earnings to cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [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] Executive Category: Executive Category [Axis] Foreign currency forward contracts Foreign Exchange Forward [Member] Canadian dollar Canada, Dollars Proceeds from debt Proceeds from Issuance of Long-Term Debt Interest expense Interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Unrealized net (loss) gain on cash flow derivatives Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Rest of World Rest of World [Member] Rest Of World [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] 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] Number of shares available for granting of options or share units (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Statement [Table] Statement [Table] Other income, net Other (income) expense, net Other Nonoperating Income (Expense) Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Receivables Receivables, Net, Current Schedule of Assets (Liabilities) Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Net proceeds from sale of marketable securities Proceeds from Sale and Maturity of Marketable Securities Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Unrecognized tax benefits Unrecognized Tax Benefits Number of banks Number of Banks Number of Banks All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Termination Date Trading Arrangement Termination Date Cash Provided by (Used in) Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Acquired identifiable intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived Revenue Business Combination, Acquiree's Revenue since Acquisition Date, Actual Denominator for basic earnings per share - weighted average shares (in shares) Weighted Average Number of Shares Outstanding, Basic Cost of products sold Cost of Product and Service Sold Unrecognized tax benefits that would affect the effective tax rate, if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Schedule of Computation of Basic and Diluted Weighted Average Shares Used in EPS Calculations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Changes to Accumulated Other Comprehensive Loss by Component Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Subsequent Events [Abstract] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number Scenario [Domain] Scenario [Domain] Income tax provision Reclassification from AOCI, Current Period, Tax Reportable Segments Reportable Segments [Member] Reportable Segments Trade payables Accounts Payable, Trade, Current Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Sell Short [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Trading Arrangement: Trading Arrangement [Axis] Common Stock Common Stock Class Undefined [Member] Common Stock Class Undefined [Member] Total Shareholder Return Amount Total Shareholder Return Amount Subsequent Event Subsequent Events [Text Block] Foreign currency translation adjustments Currency translation gains (losses) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Corporate Expenses Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Raw materials Inventory, Raw Materials, Gross Total Liabilities Liabilities Currency [Axis] Currency [Axis] All other Rest of World All Other Rest Of World [Member] AllOtherRestOfWorldMember Multi-currency revolving credit agreement, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Statement [Line Items] Statement [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Subsequent Event [Line Items] Subsequent Event [Line Items] Common Stock Common Stock [Member] Vested (in shares) Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation