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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Apr. 01, 2023 USD ($)
US Fish and Wildlife Service | Pending Litigation
Loss Contingencies [Line Items]
Inventory, non-human primates	$ 20

X

- Definition

Inventory, Non-Human Primates

+ References

No definition available.

+ Details

Name:	crl_InventoryNonHumanPrimates
Namespace Prefix:	crl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

X

- Details

Name:	srt_LitigationCaseAxis=crl_USFishAndWildlifeServiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: