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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
Jul. 01, 2023
Jul. 02, 2022
Jul. 01, 2023
Jul. 02, 2022
Disaggregation of Revenue [Line Items]        
Total net sales $ 740,576 $ 714,319 $ 1,425,250 $ 1,404,891
Waters Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 279,940 280,846 524,151 550,808
Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 135,919 131,947 269,434 257,565
TA Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 62,067 56,837 120,798 112,097
Product [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 477,926 469,630 914,383 920,470
Waters Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 237,376 222,359 461,725 439,935
TA Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 25,274 22,330 49,142 44,486
Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 262,650 $ 244,689 $ 510,867 $ 484,421