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Business Segment Information - Summary of Net Sales for Company's Products and Services (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Sep. 30, 2023
Oct. 01, 2022
Disaggregation of Revenue [Line Items]        
Total net sales $ 711,692 $ 708,555 $ 2,136,942 $ 2,113,446
Waters Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 262,142 274,869 786,293 825,677
Chemistry Consumables [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 128,650 128,096 398,084 385,661
TA Instrument Systems [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 57,289 61,958 178,087 174,055
Product [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 448,081 464,923 1,362,464 1,385,393
Waters Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 238,556 220,436 700,281 660,371
TA Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales 25,055 23,196 74,197 67,682
Service [Member]        
Disaggregation of Revenue [Line Items]        
Total net sales $ 263,611 $ 243,632 $ 774,478 $ 728,053