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Business Segment Information - Summary of Net Sales for Company's Products and Services (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 29, 2024
Jul. 01, 2023
Jun. 29, 2024
Jul. 01, 2023
Disaggregation of Revenue [Line Items]        
Total net sales $ 708,529 $ 740,576 $ 1,345,368 $ 1,425,250
Waters Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 235,228 279,940 426,487 524,151
Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 141,085 135,919 275,292 269,434
TA Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 58,831 62,067 109,516 120,798
Product [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 435,144 477,926 811,295 914,383
Waters Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 246,248 237,376 482,681 461,725
TA Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 27,137 25,274 51,392 49,142
Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 273,385 $ 262,650 $ 534,073 $ 510,867