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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
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Dec. 31, 2014 LegalMatter | Dec. 31, 2013
Loss Contingencies [Line Items] |  |
Product Warranty Accrual, Period Increase (Decrease) | $ 13.0 us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease |
Number Of Claims In Lawsuit | 3,400 us-gaap_LossContingencyPendingClaimsNumber |
Liability For claims and contingencies | 249.1 pnr_LiabilityForClaimsAndContingencies | 254.7 pnr_LiabilityForClaimsAndContingencies
Liability reserve for insurance claims | 115.8 pnr_LiabilityReserveForInsuranceClaims | 119.6 pnr_LiabilityReserveForInsuranceClaims
Environmental Reserve | 31.4 pnr_EnvironmentalReserveOtherAccruedCosts | 34.8 pnr_EnvironmentalReserveOtherAccruedCosts
Outstanding Value Of Letters Of Credit | 370.1 us-gaap_LettersOfCreditOutstandingAmount | 484.0 us-gaap_LettersOfCreditOutstandingAmount
Compliance Settlement Period | 3 years |
Water Transport [Domain] |  |
Loss Contingencies [Line Items] |  |
Outstanding Value Of Letters Of Credit | $ 32.4 us-gaap_LettersOfCreditOutstandingAmount / dei_LegalEntityAxis = pnr_WaterTransportDomain | $ 25.3 us-gaap_LettersOfCreditOutstandingAmount / dei_LegalEntityAxis = pnr_WaterTransportDomain

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- Definition Compliance Settlement Period + References No definition available. + Details
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- Definition Environmental reserve, other accrued costs. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Liability For Claims And Contingencies + References No definition available. + Details
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Namespace Prefix: | pnr_
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Balance Type: | debit
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- Definition Liability Reserve For Insurance Claims + References No definition available. + Details
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Namespace Prefix: | pnr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
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Balance Type: | na
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- Definition Total increases or decreases in the standard and extended product warranty liability during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Details
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