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Income Taxes Income Tax Disclosure [Text Block] Earnings per ordinary share Earnings Per Share [Abstract] Equity [Abstract] Equity [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Inventories Increase (Decrease) in Inventories Earnings per common share attributable to Pentair plc Earnings Per Share, Diluted And Basic [Abstract] Earnings Per Share, Diluted And Basic Self-insurance liabilities Self Insurance Reserve, Noncurrent Debt and Average Interest Rates on Debt Outstanding Schedule of Debt [Table Text Block] Deferred income taxes Deferred Income Taxes and Tax Credits 2026 Long-Term Debt, Maturity, Year Two Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Stockholders Equity Note Disclosure [Table] Stockholders Equity Note Disclosure [Table] Stockholders Equity Note Disclosure [Table] Equity Awards Adjustments Equity Awards Adjustments [Member] Net cash used for financing activities Net Cash Provided by (Used in) Financing Activities 5-year Term Loan Facility 5-year Term Loan Facility [Member] 5-year Term Loan Facility Underlying Securities Award Underlying Securities Amount Performance share units Performance Shares [Member] Deferred compensation plan Deferred Compensation Plan Assets Fair Value Disclosure Deferred Compensation Plan Assets, Fair Value Disclosure Foreign currency translation Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) Severance and related costs Severance And Related Costs [Member] Severance And Related Costs [Member] Credit Facility [Axis] Credit Facility [Axis] Amendment Flag Amendment Flag Recorded Amount Reported Value Measurement [Member] Entity Registrant Name Entity Registrant Name Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Gross profit Gross Profit Changes in Carrying Amount of Service and Product Warranties Schedule of Product Warranty Liability [Table Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Level 2 Fair Value, Inputs, Level 2 [Member] Debt Debt Disclosure [Text Block] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Debt, principal amount Debt Instrument, Face Amount Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Beginning balance Ending balance Standard and Extended Product Warranty Accrual Entity Address, Postal Zip Code Entity Address, Postal Zip Code Interest Rate Swap Interest Rate Swap [Member] Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Other liabilities Other non-current liabilities Other Liabilities, Noncurrent [Abstract] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Other Payments for (Proceeds from) Other Investing Activities Other current liabilities Increase (Decrease) in Other Current Liabilities 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] Other Allowance for Loan and Lease Losses, Foreign Currency Translation Financing activities Net Cash Provided by (Used in) Financing Activities [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] Finished goods Inventory, Finished Goods, Gross Fair Value Measurement [Domain] Fair Value Measurement [Domain] Leverage ratio covenant period Debt Instrument, Leverage Ratio Covenant Period Debt Instrument, Leverage Ratio Covenant Period Pool Pool Segment [Member] Pool Segment Basic earnings per ordinary share (in dollars per share) Basic earnings (loss) per ordinary share (in dollars per share) Earnings Per Share, Basic Accounts payable Increase (Decrease) in Accounts Payable Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Other Transformation Other Transformation [Member] Other Transformation Stock options Equity Option [Member] Prepaid expenses Other Prepaid Expense, Current Transformation costs Transformation costs Transformation Costs Transformation Costs Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Schedule of Goodwill [Table] Goodwill [Table] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total current liabilities Liabilities, Current 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] Machinery and equipment Machinery and Equipment, Gross Weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Total assets Assets 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Cost of goods sold Cost of Goods and Services Sold Borrowings outstanding Long-Term Line of Credit Options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Capital expenditures Payments to Acquire Property, Plant, and Equipment Other non-current liabilities Other Long Term Liabilities Other Long Term Liabilities Other non-current liabilities Total other non-current liabilities Other Liabilities, Noncurrent Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Termination Date Trading Arrangement Termination Date Other non-current assets and liabilities Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net 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] Net sales Revenues 2025 Long-Term Debt, Maturity, Year One Share Plans Share-Based Payment Arrangement [Text Block] Interest Rate Collar Interest Rate Collar [Member] Interest Rate Collar Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Net income Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Net contract assets Contract With Customer, Asset (Liability), Net Contract With Customer, Asset (Liability), Net Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Employee compensation and benefits Increase (Decrease) in Other Employee-Related Liabilities Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [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] Entity File Number Entity File Number Revenue Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Financial Information by Reportable Segment Schedule Of Financial Performance By Reportable Segment [Table Text Block] Schedule Of Financial Performance By Reportable Segment Table. Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Dividends declared Dividends, Common Stock Weighted average ordinary shares outstanding Weighted Average Number of Shares Outstanding, Basic [Abstract] Other current liabilities Other Accrued Liabilities, Current Name Forgone Recovery, Individual Name Industrial Industrial Sector [Member] Industrial Sector [Member] 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Five Document Period End Date Document Period End Date Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Insider Trading Arrangements [Line Items] Buildings and leasehold improvements Buildings and Improvements, Gross Supplemental Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Segment reconciling items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss on derivative hedge Gain (Loss) on Derivative Used in Net Investment Hedge, after Tax Other current assets Increase (Decrease) in Other Current Assets PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Interest Income, Operating Interest Income, Operating Adjustment to Compensation: Adjustment to Compensation [Axis] Senior Notes 4.500% Due 2029 Senior Notes 4.500% Due 2029 [Member] Senior Notes 4.500% Due 2029 Foreign Exchange Contract Foreign Exchange Contract [Member] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Senior Notes 4.650% Due 2025 Senior Notes Four Point Six Five Percent Due Twenty Twenty Five [Member] Senior Notes Four Point Six Five Percent Due Twenty Twenty Five [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained earnings Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Flow Industrial & Flow Technologies [Member] Industrial & Flow Technologies Basic (shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Total equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Restricted stock units Restricted Stock Units (RSUs) [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Changes in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Entity Filer Category Entity Filer Category Beginning balance Ending balance Accrued restructuring Restructuring Reserve Revenue, remaining performance obligation Revenue, Remaining Performance Obligation, Amount Changes in market value of derivative financial instruments, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Company Selected Measure Name Company Selected Measure Name Other Patented Technology [Member]