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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, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total net sales	$ 599,162	$ 596,219	$ 1,113,024	$ 1,126,889
Waters Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	238,777	239,928	423,389	438,031
Chemistry Consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	100,292	99,129	199,545	197,839
TA Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	48,196	49,812	84,834	92,116
Product [Member]
Disaggregation of Revenue [Line Items]
Total net sales	387,265	388,869	707,768	727,986
Waters Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	192,048	188,248	368,097	362,581
TA Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	19,849	19,102	37,159	36,322
Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 211,897	$ 207,350	$ 405,256	$ 398,903

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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-Name Accounting Standards Codification
-Topic 606
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