GOODWILL AND INTANGIBLE ASSETS - Rollforward of Company's Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Gross carrying amount, beginning balance	$ 2,849,903	$ 2,711,881
Acquisitions	209,478	215,160
Divestitures	0	(3,168)
Foreign exchange	35,664	(73,970)
Gross carrying amount, ending balance	3,095,045	2,849,903
Goodwill, impaired, accumulated impairment loss		1,000,000
RMS
Goodwill [Roll Forward]
Gross carrying amount, beginning balance	497,710	283,524
Acquisitions	0	215,752
Divestitures	0	0
Foreign exchange	(236)	(1,566)
Gross carrying amount, ending balance	497,474	497,710
DSA
Goodwill [Roll Forward]
Gross carrying amount, beginning balance	1,433,601	1,472,506
Acquisitions	209,478	0
Divestitures	0	0
Foreign exchange	19,355	(38,905)
Gross carrying amount, ending balance	1,662,434	1,433,601
Manufacturing
Goodwill [Roll Forward]
Gross carrying amount, beginning balance	918,592	955,851
Acquisitions	0	(592)
Divestitures	0	(3,168)
Foreign exchange	16,545	(33,499)
Gross carrying amount, ending balance	$ 935,137	$ 918,592