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Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Roll Forward]    
Beginning Balance $ 4,860.7us-gaap_Goodwill $ 4,837.5us-gaap_Goodwill
Acquisitions/ divestitures 6.8us-gaap_GoodwillAcquiredDuringPeriod (3.4)us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency translation/other (125.6)us-gaap_GoodwillOtherChanges 26.6us-gaap_GoodwillOtherChanges
Ending Balance 4,741.9us-gaap_Goodwill 4,860.7us-gaap_Goodwill
Valves & Controls    
Goodwill [Roll Forward]    
Beginning Balance 1,511.6us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
1,511.6us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
Acquisitions/ divestitures 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
Foreign currency translation/other 0us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
0us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
Ending Balance 1,511.6us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
1,511.6us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ValvesAndControlsMember
Process Technologies    
Goodwill [Roll Forward]    
Beginning Balance 1,524.5us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
1,500.4us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
Acquisitions/ divestitures 6.8us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
7.6us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
Foreign currency translation/other (79.8)us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
16.5us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
Ending Balance 1,451.5us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
1,524.5us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_ProcessTechnologiesMember
Flow Technologies    
Goodwill [Roll Forward]    
Beginning Balance 666.6us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
663.8us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
Acquisitions/ divestitures 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
(5.7)us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
Foreign currency translation/other (38.1)us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
8.5us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
Ending Balance 628.5us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
666.6us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_FlowTechnologiesMember
Technical Solutions    
Goodwill [Roll Forward]    
Beginning Balance 1,158.0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
1,161.7us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
Acquisitions/ divestitures 0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
(5.3)us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
Foreign currency translation/other (7.7)us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
1.6us-gaap_GoodwillOtherChanges
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
Ending Balance $ 1,150.3us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember
$ 1,158.0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= pnr_TechnicalSolutionsMember