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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. 31, 2018	Apr. 01, 2017
Revenue from External Customer [Line Items]
Product sales	$ 339,117	$ 324,296
Service sales	191,553	173,673
Total net sales	530,670	497,969
Waters Instrument Systems [Member]
Revenue from External Customer [Line Items]
Product sales	198,103	197,789
Chemistry Consumables [Member]
Revenue from External Customer [Line Items]
Product sales	98,710	87,903
TA Instrument Systems [Member]
Revenue from External Customer [Line Items]
Product sales	42,304	38,604
Waters Service [Member]
Revenue from External Customer [Line Items]
Service sales	174,333	157,734
TA Service [Member]
Revenue from External Customer [Line Items]
Service sales	$ 17,220	$ 15,939

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
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