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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Income Tax Contingency [Line Items]    
Unrecognized tax benefits, gross $ 30.7us-gaap_UnrecognizedTaxBenefits  
Uncertain tax benefits if recognized that could affect the continuing operations effective tax rate 26.9us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate  
Uncertain tax positions including accrued interest, net of tax benefits and penalties, to be resolved within the next year 5.2pki_UnrecognizedTaxBenefitsExpectedToBeResolvedWithInYear  
Open Tax Years by Major Tax Jurisdiction, Begin Date 2007  
Tax Adjustments, Settlements, and Unusual Provisions $ (1.8)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions $ (2.0)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions