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3. Foreign Exchange Forward Contracts (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Derivatives, Fair Value [Line Items]
Unrealized gain or loss on contracts maturing in April through June 2014 to sell foreign currency	$ 0
Unrealized gain or loss on contracts maturing in April through June 2014 to purchase foreign currency	0
Contracts maturing in April through June 2014 to sell foreign currency [Member]
Derivatives, Fair Value [Line Items]
Notional value	82.5
Contracts maturing in April through June 2014 to purchase foreign currency [Member]
Derivatives, Fair Value [Line Items]
Notional value	$ 373.5

X

- Definition

Unrealized Loss (Gain) on Foreign Currency Derivative Purchase Contracts

+ References

No definition available.

+ Details

Name:	bio_UnrealizedLossGainOnForeignCurrencyDerivativePurchaseContracts
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

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration