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Compensation Amount PEO Total Compensation Amount Foreign currency translation adjustments Currency translation gains (losses) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Capital expenditures Segment Reporting, Long-Lived Asset, Expenditure for Addition Other intangibles Intangible Asset, Excluding Goodwill, after Accumulated Amortization Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Notional amount Total Derivative, Notional Amount Denominator for basic earnings per share - weighted average shares (in shares) Weighted Average Number of Shares Outstanding, Basic Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reporting segments Number of Reportable Segments 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Statement of Comprehensive Income [Abstract] Earnings per Share of Common Stock Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Net proceeds from sale of marketable securities Proceeds from Sale and Maturity of Marketable Securities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] North America North America North America Segment [Member] North America Segment [Member] Total Liabilities Liabilities Trading Symbol Trading Symbol 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 Geographical [Domain] Geographical [Domain] Water heaters and related parts Water Heaters And Related Parts [Member] WaterHeatersAndRelatedPartsMember 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] Income tax benefit Income Tax Expense (Benefit) From Restructuring Charges Income Tax Expense (Benefit) From Restructuring Charges 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] Company Selected Measure Name Company Selected Measure Name 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Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Denominator for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Percentage of ownership interest acquired Business Combination, Voting Equity Interest Acquired, Percentage Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Dividends Per Share of Common Stock (in USD per share) Common Stock, Dividends, Per Share, Cash Paid Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Issuance of share units Adjustments To Additional Paid In Capital, Share Units Issued Adjustments To Additional Paid In Capital, Share Units Issued Deferred income 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Average Shares Used in EPS Calculations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Prior Restructuring Plan Prior Restructuring Plan [Member] Prior Restructuring Plan Segment Results Segment Reporting [Text Block] Minimum Minimum [Member] Dividends paid Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Schedule of Net Sales Disaggregated by Segment and Major Product Line Disaggregation of Revenue [Table Text Block] Liabilities Liabilities [Abstract] 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 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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] Interest Rate Swap Interest Rate Swap [Member] Scenario [Axis] Scenario [Axis] Repayments of debt Repayments of Long-Term Debt Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Beginning balance Ending balance Restructuring Reserve Business Combination [Table] Business Combination [Table] Acquisitions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Secured Debt [Member] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Trade payables Accounts Payable, Trade, Current Foreign currency contracts Foreign Exchange Contract [Member] Adoption Date Trading Arrangement Adoption Date Euro Euro Member Countries, Euro Share incentives and directors' compensation Stock Issued During Period Value Stock Incentive And Directors Compensation Value of stock and share units issued during the period as a result of share-based compensation plan and director compensation plan. 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 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 Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Restructuring Type [Axis] Restructuring Type [Axis] 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 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] Insider Trading Policies and Procedures [Line Items] Decrease to goodwill due to net impact of measurement period adjustment Goodwill, Measurement Period Adjustment Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Schedule of Share Unit Activity Schedule of Nonvested Share Activity [Table Text Block] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance Stock Units Performance Shares [Member] Selling, general and administrative expenses Selling, General and Administrative Expense Patents Patents [Member] Type of Restructuring [Domain] Type of Restructuring [Domain] Business Combination [Domain] Business Combination [Domain] Restructuring and impairment expenses Restructuring, Settlement and Impairment Provisions Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Share Units Restricted Stock Units (RSUs) [Member] Entity Central Index Key Entity Central Index Key Less accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Capital in excess of par value Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate Expenses Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination 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] Cash Provided by Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Stockholders’ Equity Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Restructuring Plan [Domain] Restructuring Plan [Domain] Inter-segment sales Inter-segment Elimination Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Commodity Futures Contracts Commodity Futures Contracts [Member] Commodity Futures Contracts [Member] Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Water Heaters Water Heaters [Member] WaterHeatersMember Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total Assets Assets Assets Operating Segments Operating Segments [Member] Assets (liabilities) measured at fair value Fair Value, Net Asset (Liability) Share-Based Compensation Share-Based Payment Arrangement [Text Block] Other comprehensive (loss) gain before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent PEO PEO [Member] Acquired obligations Standard and Extended Product Warranty Accrual, Increase from Business Combination Share-based compensation expense Share-Based Payment Arrangement, Expense Marketable securities Marketable Securities, Current Other liabilities Other Liabilities, Noncurrent Goodwill Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount 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 Retained Earnings Retained Earnings [Member] Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Forfeited (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Cumulative foreign currency translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Diluted Net Earnings Per Share of Common Stock (in USD 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 Cash Provided by (Used in) Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Income tax (provision) benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Cash flow hedging Cash Flow Hedging [Member] Line of Credit Facility [Line Items] Line of Credit Facility [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 Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Income tax provision Reclassification from AOCI, Current Period, Tax Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net property, plant and equipment Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Net sales Total Net Sales Revenue from Contract with Customer, Excluding Assessed Tax 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 Schedule of Restructuring Reserve Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Inventories Inventory Disclosure [Text Block] Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Exercises of stock options Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Revenue Recognition Revenue from Contract with Customer [Text Block] Product warranties Product Warranty Accrual, Current Segment Reporting [Table] Segment Reporting [Table] 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 Escrow deposit Escrow Deposit Revenue Business Combination, Acquiree's Revenue since Acquisition Date, Actual Other current assets Other Assets, Current 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] Earnings 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 Derivative [Line Items] Derivative [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] 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] 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. Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Issuance of share-based compensation Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Schedule of Impaired Long-Lived Assets Held and Used [Table] Long-Lived Asset, Held and Used, Impairment [Table] 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 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-cash impairment Asset impairment Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Trading Activities, Gain and Losses, by Type, by Income Statement Location [Table] Trading Activity, Gain (Loss) [Table] Finished products Inventory, Finished Goods, Gross Current assets Business Combination, Recognized Asset Acquired, Asset, Current Changes in Accumulated Other Comprehensive Loss by Component Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Currency [Axis] Currency [Axis] Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Class A Common Stock Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Pre-tax earnings Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Boilers, related parts, and components Boilers, Related Parts, And Components [Member] Boilers, Related Parts, And Components Member Entity Small Business Entity Small Business Comprehensive Earnings Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Weighted average useful life Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Finite-lived intangibles Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Adjustment to pension liability, less related income tax provision of $0.0 and $0.0 in 2026 and $0.1 and $0.1 in 2025 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] Product Warranties Product Warranty Disclosure [Text Block] Other assets Other Assets, Noncurrent Document Type Document Type Acquisition of business Aggregate cash purchase price, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired 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] Accrued liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Sell Short [Member] Vesting of share units Vesting Of Share Units Value of share units vested in the period. 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] Proceeds from debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Work in process Inventory, Work in Process, Gross Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Net Investment Hedges Net Investment Hedging [Member] Schedule of Performance Stock Unit Activity Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Earnings before provision for 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] Property, plant and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Income Tax Contingency [Table] Income Tax Contingency [Table] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] China CHINA Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] 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] Inventories Inventories, at LIFO cost Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Measurements Fair Value Disclosures [Text Block] Balance at beginning of year Balance at end of year Standard and Extended Product Warranty Accrual Guarantees and Product Warranties [Abstract] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Unrealized net (loss) gain on cash flow derivatives Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Shares repurchased Treasury Stock, Value, Acquired, Cost Method Cash payments Payments for Restructuring 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 Claims settled Standard and Extended Product Warranty Accrual, Decrease for Payments Acquired identifiable intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Reclassification period for effective portion of contract, in years Reclassification Period For Effective Portion Of Contract Reclassification period for effective portion of contract. Number of wholesale distributors (more than) Number Of Wholesale Distributors Number of Wholesale Distributors Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Schedule of Changes to Accumulated Other Comprehensive Loss by Component 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] 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] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent A.O. 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