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Business Segment Information - Summary of Net Sales for Company's Products and Services (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Total net sales $ 513,862 $ 530,670
Waters Instrument Systems [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 184,612 198,103
Chemistry Consumables [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 99,253 98,710
TA Instrument Systems [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 36,638 42,304
Product [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 320,503 339,117
Waters Service [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 176,049 174,333
TA Service [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales 17,310 17,220
Service [Member]    
Disaggregation of Revenue [Line Items]    
Total net sales $ 193,359 $ 191,553