XML 27 R75.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Segment Information - Additional Information (Details) $ in Millions | 9 Months Ended
--- | ---
Sep. 26, 2015 USD ($)
Operating segments | Manufacturing Support |
Segment Reporting Information [Line Items] |
Increase in manufacturing segment assets | $ 300.5

X
- Definition Change in manufacturing segment assets since prior year end. + References No definition available. + Details
Name: | crl_ChangeinMSassets
Namespace Prefix: | crl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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