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Debt - Additional Information (Detail)
9 Months Ended
Mar. 24, 2022
USD ($)
Sep. 30, 2022
USD ($)
testingPeriod
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]        
Debt, gross   $ 2,470,900,000    
Leverage ratio covenant period   12 months    
Repayments of principal in next twelve months   $ 0    
Line of Credit | Term Loans Due 2024        
Debt Instrument [Line Items]        
Debt, gross   200,000,000    
Optional line of credit limit increase   300,000,000    
Line of Credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Credit facility maximum borrowing capacity   900,000,000    
Debt, gross   451,600,000   $ 195,000,000.0
Available capacity   $ 448,400,000    
Line of Credit | Revolving Credit Facility | Pentair, Pentair Finance S.à r.l (“PFSA“)        
Debt Instrument [Line Items]        
Debt agreement financial covenant, leverage ratio   4.25    
Number of testing periods | testingPeriod   4    
Line of Credit | Revolving Credit Facility | Maximum        
Debt Instrument [Line Items]        
Debt covenant, unrestricted cash   $ 250,000,000    
Debt agreement financial covenant, leverage ratio   3.75    
EBITDA ratio for debt   3.00    
Line of Credit | Revolving Credit Facility | Minimum        
Debt Instrument [Line Items]        
Debt covenant, unrestricted cash   $ 5,000,000    
Debt agreement financial covenant, leverage ratio   1.00    
EBITDA ratio for debt   1.00    
Term Loans | Term Loans Due 2024        
Debt Instrument [Line Items]        
Debt, gross   $ 200,000,000.0   $ 200,000,000.0
Term Loans | 5-year Term Loan Facility        
Debt Instrument [Line Items]        
Debt, gross $ 600,000,000 1,000,000,000 $ 1,000,000,000  
Debt term 5 years      
Long-term Debt, Increase to obligation     $ 400,000,000  
Other Credit Facilities        
Debt Instrument [Line Items]        
Credit facility maximum borrowing capacity   20,900,000    
Borrowings outstanding   $ 0