XML 73 R64.htm IDEA: XBRL DOCUMENT v2.4.1.9

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 28, 2015
Loss Contingencies [Line Items]
Increase in lease obligations	$ 6.9crl_OperatingLeasesFutureMinimumPaymentsDueinNextFiveYearsIncrease
Government billing [Member]
Loss Contingencies [Line Items]
Reserve for estimated possible loss	$ 1.5us-gaap_LossContingencyEstimateOfPossibleLoss / us-gaap_LossContingenciesByNatureOfContingencyAxis = crl_GovernmentbillingMember

X

- Definition

Operating Leases, Future Minimum Payments, Due in Next Five Years, Increase

+ References

No definition available.

+ Details

Name:	crl_OperatingLeasesFutureMinimumPaymentsDueinNextFiveYearsIncrease
Namespace Prefix:	crl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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

X

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=crl_GovernmentbillingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: