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Business Segment Information - Summary of Net Sales for Company's Products and Services (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total net sales	$ 872,714	$ 740,305	$ 708,529	$ 636,839	$ 819,474	$ 711,692	$ 740,576	$ 684,674	$ 2,958,387	$ 2,956,416	$ 2,971,956
Waters Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales									1,032,493	1,108,702	1,210,456
Chemistry Consumables [Member]
Disaggregation of Revenue [Line Items]
Total net sales									565,481	541,469	525,399
TA Instrument Systems [Member]
Disaggregation of Revenue [Line Items]
Total net sales									246,202	252,879	252,314
Product [Member]
Disaggregation of Revenue [Line Items]
Total net sales									1,844,176	1,903,050	1,988,169
Waters Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales									1,006,447	951,419	890,607
TA Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales									107,764	101,947	93,180
Service [Member]
Disaggregation of Revenue [Line Items]
Total net sales									$ 1,114,211	$ 1,053,366	$ 983,787

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