v3.26.1
Debt - Additional Information (Detail)
1 Months Ended 6 Months Ended
Jun. 30, 2028
USD ($)
Jun. 30, 2027
USD ($)
May 31, 2026
USD ($)
Jun. 30, 2026
USD ($)
testingPeriod
Dec. 31, 2025
USD ($)
Jun. 30, 2022
USD ($)
Debt Instrument [Line Items]            
Debt, gross       $ 1,620,000,000    
Leverage ratio covenant period       12 months    
Line of Credit | Term Loans Due 2024            
Debt Instrument [Line Items]            
Optional line of credit limit increase       $ 450,000,000.0    
Line of Credit | Revolving Credit Facility            
Debt Instrument [Line Items]            
Credit facility maximum borrowing capacity       900,000,000.0    
Available capacity       580,000,000.0    
Debt, gross       $ 320,000,000.0 $ 277,700,000  
Line of Credit | Revolving Credit Facility | Pentair, Pentair Finance S.à r.l (“PFSA“)            
Debt Instrument [Line Items]            
Number of testing periods | testingPeriod       4    
Line of Credit | Revolving Credit Facility | Minimum            
Debt Instrument [Line Items]            
Debt covenant, unrestricted cash       $ 5,000,000.0    
Debt agreement financial covenant, leverage ratio       1.00    
EBITDA ratio for debt       1.00    
Line of Credit | Revolving Credit Facility | Minimum | Pentair, Pentair Finance S.à r.l (“PFSA“)            
Debt Instrument [Line Items]            
Debt agreement financial covenant, leverage ratio       4.25    
Line of Credit | Revolving Credit Facility | Maximum            
Debt Instrument [Line Items]            
Debt covenant, unrestricted cash       $ 250,000,000.0    
Debt agreement financial covenant, leverage ratio       3.75    
EBITDA ratio for debt       3.00    
Line of Credit | Revolving Credit Facility | Maximum | Pentair, Pentair Finance S.à r.l (“PFSA“)            
Debt Instrument [Line Items]            
Debt agreement financial covenant, leverage ratio       1.00    
Term Loans            
Debt Instrument [Line Items]            
Repayments of principal in next twelve months       $ 3,100,000    
Term Loans | 5-year Term Loan Facility            
Debt Instrument [Line Items]            
Debt, gross       0 575,000,000.0  
Term Loans | 4-year Term Loan Facility            
Debt Instrument [Line Items]            
Debt, principal amount       500,000,000.0    
Debt, gross       500,000,000.0 $ 0  
Term Loans | 4-year Term Loan Facility | Forecast            
Debt Instrument [Line Items]            
Debt installment payment amount $ 6,300,000 $ 3,100,000        
Unsecured Debt | 5-year Term Loan Facility            
Debt Instrument [Line Items]            
Debt, principal amount           $ 1,000,000,000.0
Repayments of long-term debt     $ 575,000,000.0      
Other Credit Facilities            
Debt Instrument [Line Items]            
Credit facility maximum borrowing capacity       21,100,000    
Borrowings outstanding       $ 0