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Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Effective Tax Rate (Detail)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Federal statutory income tax rate 21.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate [1] 7.80%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate [1] 7.80%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate [1]
Tax effect of international operations (4.90%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential [2] 10.40%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential [2] 23.50%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential [2]
Change in valuation allowances 3.40%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 5.70%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance  
Withholding taxes 2.30%pnr_EffectiveIncomeTaxRateReconciliationWithholdingTaxes 1.10%pnr_EffectiveIncomeTaxRateReconciliationWithholdingTaxes  
Interest limitations 0.80%pnr_EffectiveIncomeTaxRateReconciliationInterestLimitations 0.50%pnr_EffectiveIncomeTaxRateReconciliationInterestLimitations  
Non-deductible transaction costs     (5.90%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Impact of debt-financing     13.60%pnr_EffectiveIncomeTaxRateReconciliationAtNondeductibleDebtConversionExpense
Resolution of tax audits     7.00%pnr_EffectiveIncomeTaxRateReconciliationAuditActivity
Effective tax rate 22.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations 25.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations 46.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
[1] The statutory rate for 2014 reflects the U.K. statutory rate of 21 percent. For 2013 and 2012, the statutory rate reflects the Swiss statutory rate of 7.8 percent.
[2] The tax effect of international operations for 2014 consists of non-U.K. jurisdictions. For 2013 and 2012, the tax effect of international operations consists of non-Swiss jurisdictions.