XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

BASIS OF PRESENTATION (Details) | 3 Months Ended
--- | ---
Mar. 30, 2024 segment subsegment
Number of reportable segments | segment | 3
Discover And Safety Assessment Segment |
Number of businesses in reportable segment | subsegment | 2

X
- Definition Number Of Subsegments + References No definition available. + Details
Name: | crl_NumberOfSubsegments
Namespace Prefix: | crl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=crl_DiscoverAndSafetyAssessmentSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |