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Goodwill and Other Identifiable Intangible Assets - 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
Amortization and Impairment |  |  |  |
Accumulated goodwill impairment losses | $ 200.5 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | $ 200.5 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | $ 200.5 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss |
Amortization |  | 114.0 us-gaap_AmortizationOfIntangibleAssets | 134.1 us-gaap_AmortizationOfIntangibleAssets | 74.9 us-gaap_AmortizationOfIntangibleAssets
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
Water Quality Systems [Member] |  |  |  |
Amortization and Impairment |  |  |  |
Impairment charges, related to trade names |  |  |  | 10.0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_StatementBusinessSegmentsAxis = pnr_WaterQualitySystemsMember
Technical Solutions |  |  |  |
Amortization and Impairment |  |  |  |
Impairment charges, related to trade names |  |  | 11.0 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_StatementBusinessSegmentsAxis = pnr_TechnicalSolutionsMember | 11.6 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_StatementBusinessSegmentsAxis = pnr_TechnicalSolutionsMember
Flow & Filtration Solutions [Member] |  |  |  |
Amortization and Impairment |  |  |  |
Impairment charges, related to trade names |  |  |  | $ 39.1 us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_StatementBusinessSegmentsAxis = pnr_FlowFiltrationSolutionsMember

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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