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3. Foreign Exchange Forward Contracts (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Derivatives, Fair Value [Line Items]
Unrealized loss on contracts maturing in April through June 2015 to sell foreign currency	$ 0.8bio_UnrealizedLossGainOnForeignCurrencyDerivativeSaleContracts
Unrealized gain on contracts maturing in April through June 2015 to purchase foreign currency	0.7bio_UnrealizedLossGainOnForeignCurrencyDerivativePurchaseContracts
Forward foreign exchange contract to sell foreign currency [Member]
Derivatives, Fair Value [Line Items]
Notional value	75.6invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = bio_ForwardforeignexchangecontracttosellforeigncurrencyMember
Forward foreign exchange contract to purchase foreign currency [Member]
Derivatives, Fair Value [Line Items]
Notional value	$ 262.3invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = bio_ForwardforeignexchangecontracttopurchaseforeigncurrencyMember

X

- Definition

Unrealized Loss (Gain) on Foreign Currency Derivative Purchase Contracts

+ References

No definition available.

+ Details

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Namespace Prefix:	bio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Unrealized Loss (Gain) on Foreign Currency Derivative Sale Contracts

+ References

No definition available.

+ Details

Name:	bio_UnrealizedLossGainOnForeignCurrencyDerivativeSaleContracts
Namespace Prefix:	bio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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- Details

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- Details

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X

- Details

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