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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. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Disaggregation of Revenue [Line Items]
Total net sales	$ 596,219	$ 558,250	$ 1,126,889	$ 1,056,219
Waters Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	239,928	238,548	438,031	436,337
Chemistry Consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales	99,129	90,824	197,839	178,727
TA Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales	49,812	43,466	92,116	82,070
Product [Member]
Disaggregation of Revenue [Line Items]
Total net sales	388,869	372,838	727,986	697,134
Waters Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	188,248	168,408	362,581	326,142
TA Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	19,102	17,004	36,322	32,943
Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 207,350	$ 185,412	$ 398,903	$ 359,085

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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
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