Entity tax identification number Entity Tax Identification Number Rollover EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Less: Change in cumulative deemed distributions of participant loans EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Deemed Distribution Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Less: Interest on deemed distributions of participant loans EBP, Reconciliation to Form 5500, Net Investment Income, Interest On Deemed Distribution EBP, Reconciliation to Form 5500, Net Investment Income, Interest On Deemed Distribution EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Pretax, maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount FAIR VALUE MEASUREMENTS EBP, Investment, Fair Value and NAV [Text Block] Minimum borrowing amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Primary residence, borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Interest, dividend and other income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), after Investment Expense EBP 002 EBP 002 [Member] EBP 002 Investments — at fair value Total investments at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Level 1 Fair Value, Inputs, Level 1 [Member] Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, Investment, Fair Value and NAV [Abstract] Basis spread on variable rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate Total assets EBP, Asset ASSETS: EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] CONTRIBUTIONS: EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Payments of benefits EBP, Payment to Participant [Policy Text Block] Less: Deemed distributions of participant loans EBP, Reconciliation to Form 5500, Payment to Participant, Increase (Decrease) from Deemed Distribution Amendment Flag Amendment Flag Less: Cumulative deemed distributions of participant loans Deemed distribution EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Basis of accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Notes receivable from participants per Form 5500 EBP, Form 5500 Caption, Participant Loans Number of shares held by plan EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] EBP, Participant Contribution Catch-Up Limit EBP, Participant Contribution Catch-Up Limit EBP, Participant Contribution Catch-Up Limit Schedule of Investments, Fair Value EBP, Investment, Fair Value and NAV [Table Text Block] Investments [Domain] Investments [Domain] Use of estimates EBP, Use of Estimate [Policy Text Block] FORM 5500, SCHEDULE H, PART IV LINE 4i — SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] General loan, borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Employee EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Net appreciation in the fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] DESCRIPTION OF THE PLAN EBP, Description of Plan [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Contributions EBP, Contribution [Policy Text Block] Pentair common stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Investment, Identifier [Axis] Investment, Identifier [Axis] Maximum number of withdrawals per calendar year EBP, Withdrawal, Maximum Number Of Withdrawals Per Calendar Year EBP, Withdrawal, Maximum Number Of Withdrawals Per Calendar Year Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Asset held for investment, total EBP, Asset Held for Investment Document Information [Line Items] Document Information [Line Items] Interest-bearing cash Interest-Bearing Deposits [Member] Employer contribution, percent of participant compensation matched EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Automatic deferral rate, annual increase EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate Participant contribution, vesting percentage EBP, Participant Contribution, Vesting Percentage EBP, Participant Contribution, Vesting Percentage Change in net assets available for benefits per Form 5500 EBP, Form 5500 Caption, Net Income (Loss) Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash EBP, Tax Status [Table] EBP, Tax Status [Table] CHANGE IN NET ASSETS Change in net assets available for benefits per the financial statements EBP, Change in Net Asset Available for Benefit, Increase (Decrease) EXEMPT PARTY-IN-INTEREST TRANSACTIONS EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] Refund of excess contributions EBP, Excess Contribution Payable EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total receivables EBP, Receivable After tax, maximum annual compensation to total compensation, percentage EBP, Participant Contribution, After Tax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant Contribution, After Tax, Maximum Annual Compensation to Total Compensation, Percentage Employer contributions receivable EBP, Employer Contribution, Receivable Automatic deferral rate EBP, Participant Contribution, Automatic, Deferral Rate Investment, dividend income EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Employer contribution, vesting percentage EBP, Employer Contribution, Vesting Percentage EBP, Employer Contribution, Vesting Percentage Distributions to participants Distributions to participants per the financial statements EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Asset held for investment, investment EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Participant Catch-Up Contribution, Minimum Age EBP, Participant Catch-Up Contribution, Minimum Age EBP, Participant Catch-Up Contribution, Minimum Age EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] EBP, Form 5500 Caption, Net Investment Income EBP, Form 5500 Caption, Net Investment Income EBP, Form 5500 Caption, Net Investment Income EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Total maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant Contribution, Maximum Annual Compensation to Total Compensation, Percentage EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Distributions to participants per Form 5500 EBP, Form 5500 Caption, Benefit Payment and Payments to Provide Benefits RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Asset held for investment, notes receivable EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment valuation and income recognition EBP, Investment [Policy Text Block] Employee contributions receivable EBP, Participant Contribution, Receivable Level 1, Level 2, and Level 3 Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Document Type Document Type PLAN TERMINATION EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Common collective trusts Common Collective Trust [Member] Participant contribution, minimum age EBP, Participant Contribution, Minimum Age EBP, Participant Contribution, Minimum Age EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] DEDUCTIONS: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] EBP, Participant Contribution Limit EBP, Participant Contribution Limit EBP, Participant Contribution Limit Forfeited nonvested account, decrease from employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants Notes receivable from participants per the financial statements EBP, Note Receivable from Participant Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] SIGNIFICANT ACCOUNTING POLICIES EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Investment, cost EBP, Investment, Excluding Plan Interest in Master Trust, Cost FEDERAL INCOME TAX STATUS EBP, Tax Status [Text Block] Employer contribution, vesting service period EBP, Employer Contribution, Vesting Service Period EBP, Employer Contribution, Vesting Service Period Maximum borrowing to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Document Information [Table] Document Information [Table] Notes receivable from participants EBP, Note Receivable from Participant [Policy Text Block] Total investment income Total investment income per the financial statements EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment NAV redemption, notice period EBP, Fair Value, Investment, NAV, Redemption, Notice Period EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level 3 Fair Value, Inputs, Level 3 [Member] NET ASSETS AVAILABLE FOR BENEFITS NET ASSETS AVAILABLE FOR BENEFITS — Beginning of year NET ASSETS AVAILABLE FOR BENEFITS — End of year Net assets available for benefits per the financial statements EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Forfeited nonvested account EBP, Forfeited Nonvested Account Employer contribution, mtching percentage EBP, Employer Contribution, Matching Percentage Net assets available for benefits per Form 5500 EBP, Form 5500 Caption, Net Assets Investments valued at NAV Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]