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2. Acquisitions (Details) (USD $)
 12 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Jun. 30, 2014
Jan. 10, 2013
Mar. 31, 2014
Jun. 30, 2013
Dec. 31, 2012
Apr. 10, 2014
Business Acquisition [Line Items]                  
Goodwill, Acquired During Period $ 13,500,000us-gaap_GoodwillAcquiredDuringPeriod $ 14,900,000us-gaap_GoodwillAcquiredDuringPeriod              
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value 27,700,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue 20,800,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue 27,700,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue            
Goodwill 500,441,000us-gaap_Goodwill 517,770,000us-gaap_Goodwill 500,441,000us-gaap_Goodwill         495,400,000us-gaap_Goodwill  
GnuBIO [Member]                  
Business Acquisition [Line Items]                  
Business Acquisition, Percentage of Voting Interests Acquired                 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember
Business Combination, Consideration Transferred       50,400,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		          
Payments to Acquire Businesses, Net of Cash Acquired       39,700,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		          
Goodwill, Purchase Accounting Adjustments     (1,700,000)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		            
Indefinite-lived Intangible Assets Acquired       46,400,000us-gaap_IndefinitelivedIntangibleAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		          
Goodwill, Acquired During Period       13,500,000us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		          
Business Combination, Contingent Consideration, Liability 10,000,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		   10,000,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember		           10,700,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High                 70,000,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net                 (9,500,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= bio_GnuBIOMember
AbD Serotec [Member]                  
Business Acquisition [Line Items]                  
Business Acquisition, Percentage of Voting Interests Acquired         100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		        
Business Combination, Consideration Transferred         62,200,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		        
Cash Acquired from Acquisition           7,300,000us-gaap_CashAcquiredFromAcquisition
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		      
Finite-Lived Intangible Assets, Purchase Accounting Adjustments             1,700,000us-gaap_FiniteLivedIntangibleAssetsPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		    
Goodwill, Purchase Accounting Adjustments             (2,100,000)us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		    
bio_NetAssetPurchaseAccountingAdjustment             400,000bio_Bio_NetAssetPurchaseAccountingAdjustment
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		    
Goodwill         14,900,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net         3,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		        
Finite-lived Intangible Assets Acquired         44,000,000us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_BusinessAcquisitionAxis
= bio_AbdSerotecMember		        
Fair Value, Measurements, Recurring [Member]                  
Business Acquisition [Line Items]                  
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value $ 27,700,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 [1] $ 20,800,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 [1] $ 27,700,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember		 [1]            
[1] Contingent consideration liabilities are included in the following accounts in the Consolidated Balance Sheets (in millions): December 31, 2014 December 31, 2013 Other current liabilities$13.1 $6.1Other long-term liabilities14.6 14.7 Total$27.7 $20.8