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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. 02, 2022
Jul. 03, 2021
Jul. 02, 2022
Jul. 03, 2021
Disaggregation of Revenue [Line Items]        
Total net sales $ 714,319 $ 681,647 $ 1,404,891 $ 1,290,192
Waters Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 280,846 261,363 550,808 477,435
Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 131,947 126,459 257,565 245,433
TA Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 56,837 53,133 112,097 100,109
Total product sales [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 469,630 440,955 920,470 822,977
Waters Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 222,359 219,502 439,935 426,334
TA Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 22,330 21,190 44,486 40,881
Total service sales [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 244,689 $ 240,692 $ 484,421 $ 467,215