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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Significant Accounting Policies [Line Items] |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  | $ 20.9 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 16.6 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse |
Revenue Recognition |  |  |  |
Cost in excess of billings | 91.6 us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms | 103.5 us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms | 91.6 us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms |
Billings in excess of cost | 35.4 us-gaap_BillingsInExcessOfCostCurrent | 41.4 us-gaap_BillingsInExcessOfCostCurrent | 35.4 us-gaap_BillingsInExcessOfCostCurrent |
Research and development |  |  |  |
Research and development |  | 117.3 us-gaap_ResearchAndDevelopmentExpense | 122.8 us-gaap_ResearchAndDevelopmentExpense | 92.3 us-gaap_ResearchAndDevelopmentExpense
Goodwill and identifiable intangible assets |  |  |  |
Goodwill planning period |  | 6 years |  |
Perpetual growth rate |  | 3.00%pnr_PerpetualGrowthRatePercent |  |
Impairment charges, related to trade names | 11.0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill | 0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill | 11.0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill | 60.7 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Goodwill and intangible assets |  | 6,350.0 pnr_GoodwillAndIntangibleAssetsNet |  |
Goodwill and intangible assets as a percentage of total assets |  | 60.00%pnr_PercentofTotalAssetsGoodwillAndIntangibles |  |
Equity and cost method investments |  |  |  |
Investments in and loans to equity method investees | 12.2 us-gaap_EquityMethodInvestments | 12.9 us-gaap_EquityMethodInvestments | 12.2 us-gaap_EquityMethodInvestments |
Aggregate balance cost method investments | 8.3 us-gaap_CostMethodInvestments | 8.6 us-gaap_CostMethodInvestments | 8.3 us-gaap_CostMethodInvestments |
Insurance subsidiary |  |  |  |
Reserve for policy claims | 51.1 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense | 58.1 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense | 51.1 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense |
Minimum |  |  |  |
Basis of presentation |  |  |  |
Equity method investment, ownership percentage |  | 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Goodwill and identifiable intangible assets |  |  |  |
Discounted cash flows discount rate |  | 11.00%pnr_DiscountedCashFlowMethodPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Maximum |  |  |  |
Basis of presentation |  |  |  |
Equity method investment, ownership percentage |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Goodwill and identifiable intangible assets |  |  |  |
Discounted cash flows discount rate |  | 12.00%pnr_DiscountedCashFlowMethodPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Other Current Liabilities |  |  |  |
Insurance subsidiary |  |  |  |
Reserve for policy claims | 13.2 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember | 13.2 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember | 13.2 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember |
Other Noncurrent Liabilities |  |  |  |
Insurance subsidiary |  |  |  |
Reserve for policy claims | $ 37.9 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember | $ 44.9 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember | $ 37.9 us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember |
Credit Concentration Risk |  |  |  |
Trade receivables and concentration of credit risk |  |  |  |
Customer receivable balances to total trade receivables |  | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |
Number of customers | 0 pnr_NumberOfCustomersWithSignificantAccountsReceivableBalance / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember | 0 pnr_NumberOfCustomersWithSignificantAccountsReceivableBalance / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember | 0 pnr_NumberOfCustomersWithSignificantAccountsReceivableBalance / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |

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