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activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Stockholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Three Months Variable Rate, Period Two [Member] Variable Rate, Period Two Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Compensation and benefits Other Employee-related Liabilities, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Interest rate decrease Debt Instrument, Interest Rate, Increase (Decrease) Schedule of Gross Carrying Amount and Accumulated Amortization for Finite-Lived Intangible Assets Intangible Asset, Finite-Lived [Table Text Block] Intellihot, Inc Intellihot, Inc [Member] Intellihot, Inc Applicable margin Debt Instrument, Basis Spread on Variable Rate Commissions Accrued Sales Commission, Current City Area Code City Area Code Variable Rate [Domain] 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ABR Borrowings, 3.00% plus a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the prime rate determined from time to time by Credit Suisse AG, the administrative agent under the Second Restated Credit Agreement and (3) the LIBO rate in effect for a one-month period plus 1.00%; or (b) in the case of Eurocurrency Borrowings, 4.00% plus a Eurocurrency rate determined by reference to an annual interest rate equal to (x) the LIBO rate in effect for a given interest period divided by (y) one minus a statutory reserve applicable to such borrowing (subject to a 1% LIBOR floor). This loan facility matures on April 1, 2018. 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Date of Prior Year Equity Awards Vested in Covered Year [Member] Common stock dividend declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost Defined Benefit Plan, Service Cost Proceeds from exercise of stock options and ESPP contributions Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Gain Contingencies [Line Items] Gain Contingencies [Line Items] Weighted Average Grant-Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Finished goods Inventory, Finished Goods, Gross Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Equity 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Names [Member] Zurn Industries, LLC Zurn Industries, LLC [Member] Zurn Industries, LLC Schedule of Assets and Liabilities Recognized at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventories, net Inventories, net Inventory, Net Award Type [Domain] Award Type [Domain] IEEPA Tariff Refund IEEPA Tariff Refund [Member] IEEPA Tariff Refund Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Measurements Fair Value Disclosures [Text Block] Movement in Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Level 3 Fair Value, Inputs, Level 3 [Member] Sales rebates Accrued Sales Rebate, Current Accrued Sales Rebate, Current Amortization expense in fiscal year 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One PEO Name PEO Name Geographical [Axis] Geographical [Axis] Accruals and other Increase (Decrease) in Accrued Liabilities Other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Cash payments Payments for Restructuring Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Professional fees Accrued Professional Fees, Current Accounts payable Increase (Decrease) in Accounts Payable Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] 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] Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Basis of Presentation and Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Preliminary cash purchase price Payments to Acquire Businesses, Gross Subsequent Event [Table] Subsequent Event [Table] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Amortization expense in fiscal year 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Debt Schedule of Debt [Table Text Block] Employee Stock Purchase Plan Employee Stock [Member] Customer [Domain] Customer [Domain] Schedule of Major Classes of Inventories Schedule of Inventory, Current 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Issued in Period Cover page. 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