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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   $ 20.9us-gaap_ImpairmentOfLongLivedAssetsHeldForUse $ 16.6us-gaap_ImpairmentOfLongLivedAssetsHeldForUse  
Revenue Recognition        
Cost in excess of billings 91.6us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms 103.5us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms 91.6us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms  
Billings in excess of cost 35.4us-gaap_BillingsInExcessOfCostCurrent 41.4us-gaap_BillingsInExcessOfCostCurrent 35.4us-gaap_BillingsInExcessOfCostCurrent  
Research and development        
Research and development   117.3us-gaap_ResearchAndDevelopmentExpense 122.8us-gaap_ResearchAndDevelopmentExpense 92.3us-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 11.0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 11.0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill 60.7us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Goodwill and intangible assets   6,350.0pnr_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 12.2us-gaap_EquityMethodInvestments 12.9us-gaap_EquityMethodInvestments 12.2us-gaap_EquityMethodInvestments  
Aggregate balance cost method investments 8.3us-gaap_CostMethodInvestments 8.6us-gaap_CostMethodInvestments 8.3us-gaap_CostMethodInvestments  
Insurance subsidiary        
Reserve for policy claims 51.1us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense 58.1us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense 51.1us-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 13.2us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
13.2us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
13.2us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
 
Other Noncurrent Liabilities        
Insurance subsidiary        
Reserve for policy claims $ 37.9us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
$ 44.9us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
$ 37.9us-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 0pnr_NumberOfCustomersWithSignificantAccountsReceivableBalance
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
0pnr_NumberOfCustomersWithSignificantAccountsReceivableBalance
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
0pnr_NumberOfCustomersWithSignificantAccountsReceivableBalance
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember