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4. Goodwill and other Purchased Intangible Assets Intangible Assets, Goodwill and Other (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
Goodwill [Roll Forward]
Goodwill period start	$ 546,000,000us-gaap_GoodwillGross	$ 523,600,000us-gaap_GoodwillGross
Accumulated impairment loss period start	(28,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss	(28,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Goodwill, net period start	517,770,000us-gaap_Goodwill	495,400,000us-gaap_Goodwill
Goodwill, Acquired During Period	13,500,000us-gaap_GoodwillAcquiredDuringPeriod	14,900,000us-gaap_GoodwillAcquiredDuringPeriod
Goodwill, Written off Related to Sale of Business Unit	0us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit	0us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit	(1,000,000)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Currency fluctuations	(30,900,000)us-gaap_GoodwillTranslationAdjustments	7,500,000us-gaap_GoodwillTranslationAdjustments
Goodwill period end	528,600,000us-gaap_GoodwillGross	546,000,000us-gaap_GoodwillGross	523,600,000us-gaap_GoodwillGross	523,600,000us-gaap_GoodwillGross
Accumulated impairment loss period end	(28,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss	(28,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss	(28,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss	(28,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Goodwill, net period end	500,441,000us-gaap_Goodwill	517,770,000us-gaap_Goodwill	495,400,000us-gaap_Goodwill	495,400,000us-gaap_Goodwill
Life Science [Member]
Goodwill [Roll Forward]
Goodwill period start	209,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	193,600,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Accumulated impairment loss period start	(27,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	(27,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Goodwill, net period start	181,800,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	166,400,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Goodwill, Acquired During Period	0us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	14,900,000us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Currency fluctuations	(1,300,000)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	500,000us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Goodwill period end	207,700,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	209,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Accumulated impairment loss period end	(27,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	(27,200,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Goodwill, net period end	180,500,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember	181,800,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_LifeScienceMember
Clinical Diagnostics [Member]
Goodwill [Roll Forward]
Goodwill period start	337,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	330,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Accumulated impairment loss period start	(1,000,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	(1,000,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Goodwill, net period start	336,000,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	329,000,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Goodwill, Acquired During Period	13,500,000us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	0us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Goodwill, Written off Related to Sale of Business Unit				(1,000,000)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Currency fluctuations	(29,600,000)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	7,000,000us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Goodwill period end	320,900,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	337,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	330,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	330,000,000us-gaap_GoodwillGross / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Accumulated impairment loss period end	(1,000,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	(1,000,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	(1,000,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	(1,000,000)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember
Goodwill, net period end	$ 319,900,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	$ 336,000,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	$ 329,000,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember	$ 329,000,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = bio_ClinicalDiagnosticsMember

X

- Definition

Amount after accumulated impairment loss of 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

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Amount before accumulated impairment loss of 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

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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

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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