COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jul. 01, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation On February 16, 2023, the Company was informed by the U.S. Department of Justice (DOJ) that in conjunction with the U.S. Fish and Wildlife Service (USFWS), it had commenced an investigation into the Company’s conduct regarding several shipments of non-human primates from Cambodia. On February 17, 2023 the Company received a grand jury subpoena requesting certain documents related to such investigation. The Company is aware of a parallel civil investigation being undertaken by the DOJ and USFWS. The Company is cooperating with the DOJ and the USFWS and believes that the concerns raised with respect to the Company’s conduct are without merit. The Company maintains a global supplier onboarding and oversight program incorporating risk-based due diligence, auditing, and monitoring practices to help ensure the quality of our supplier relationships and compliance with applicable U.S. and international laws and regulations, and has operated under the belief that all shipments of non-human primates it received satisfied the material requirements, documentation and related processes and procedures of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) documentation and related processes and procedures, which guides the release of each import by USFWS. Notwithstanding our efforts and good-faith belief, in connection with the civil investigation, the Company has voluntarily suspended future shipments of non-human primates from Cambodia to the United States until such time that the Company and USFWS can agree upon and implement additional procedures to reasonably ensure that non-human primates imported from Cambodia are purpose-bred. The Company continues to care for the Cambodia-sourced non-human primates from certain recent shipments in the United States. The carrying value of the inventory related to these shipments is approximately $20 million. On May 16, 2023, the Company received an inquiry from the Enforcement Division of the U.S. Securities and Exchange Commission (SEC) requesting it to voluntarily provide information primarily related to the sourcing of non-human primates in Asia, and the Company is cooperating with the request. The Company is not able to predict what action, if any, might be taken in the future by the DOJ, USFWS, SEC or other governmental authorities as a result of the investigations. None of the DOJ, USFWS or SEC has provided the Company with any specific timeline or indication as to when these investigations or, specific to the DOJ and USFWS, discussions regarding future processes and procedures, will be concluded or resolved. The Company cannot predict the timing, outcome or possible impact of the investigations, including without limitation any potential fines, penalties or liabilities. A putative securities class action was filed on May 19, 2023 against the Company and three of its current/former officers (James Foster, the Chief Executive Officer; David R. Smith, the former Chief Financial Officer; and Flavia Pease, the current Chief Financial Officer) in the United States District Court for the District of Massachusetts. The case, which is captioned Coleman v. Charles River Laboratories International, Inc., et al., Case No. 23-cv-11132, asserts claims under §§ 10(b) and 20(a) of the Securities Exchange Act of 1934 (the "Exchange Act") on behalf of a putative class of purchasers of Company securities from May 5, 2020 through February 21, 2023. The Complaint alleges that certain of the Company’s disclosures about its practices with respect to the importation of non-human primates made during the putative class period were materially false or misleading. A lead plaintiff has yet to be appointed and the Company intends to file a motion to dismiss. While the Company cannot predict the outcome of this matter, it believes the class action to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in excess of amounts accrued for this matter. Aside from the matter above, the Company believes there are no other matters pending against the Company that could have a material impact on the Company’s business, financial condition, or results of operations.