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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Disaggregation of Revenues by Major Business Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,032,135	$ 1,026,117	$ 2,016,303	$ 2,037,677
RMS
Disaggregation of Revenue [Line Items]
Total revenue	213,271	206,389	426,344	427,296
RMS | Services and products transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	97,748	95,299	194,752	192,348
RMS | Services and products transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	115,523	111,090	231,592	234,948
DSA
Disaggregation of Revenue [Line Items]
Total revenue	618,029	627,419	1,210,638	1,232,871
DSA | Services and products transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	617,865	626,785	1,209,385	1,230,910
DSA | Services and products transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	164	634	1,253	1,961
Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	200,835	192,309	379,321	377,510
Manufacturing | Services and products transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	106,617	104,481	198,084	204,539
Manufacturing | Services and products transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	$ 94,218	$ 87,828	$ 181,237	$ 172,971

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