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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. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total net sales	$ 578,021	$ 565,584	$ 1,704,910	$ 1,621,803
Waters Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	238,986	238,431	677,017	674,768
Chemistry Consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	95,979	92,879	293,818	271,606
TA Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	43,557	44,240	135,673	126,310
Product [Member]
Disaggregation of Revenue [Line Items]
Total net sales	378,522	375,550	1,106,508	1,072,684
Waters Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	180,830	172,594	543,411	498,736
TA Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	18,669	17,440	54,991	50,383
Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 199,499	$ 190,034	$ 598,402	$ 549,119

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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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