XML 132 R118.htm IDEA: XBRL DOCUMENT
v3.20.4

COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 26, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract] |
Deductible amount under insurance policies | $ 1,500
Certain property insurance, deductibles | 5,000
Representation and warranty insurance, maximum deductible | 8,000
Unconditional purchase obligations | $ 197,368

X
- Definition Insurance Policies, Deductible + References No definition available. + Details
Name: | crl_InsurancePoliciesDeductible
Namespace Prefix: | crl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Property Insurance, Deductible + References No definition available. + Details
Name: | crl_PropertyInsuranceDeductible
Namespace Prefix: | crl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Representation And Warranty Insurance, Deductible + References No definition available. + Details
Name: | crl_RepresentationAndWarrantyInsuranceDeductible
Namespace Prefix: | crl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant