v3.26.1
Schedule of Assets (Held at End of Year) (Detail) - EBP 002 [Member]
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity Tax Identification Number 04-3234558
EBP, Plan Number 002
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 1,376,169,449
EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution 8,220,619 [1]
Waters Corporation Stock Fund [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value 68,573,848
Mutual Fund [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value 91,975,288
Common Collective Trust [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 1,146,182,385
Investment, Identifier [Axis]: Collective trusts | American Century Funds | American Century U.S. Small Cap Value Equity Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] American Century U.S. Small Cap Value Equity Fund [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 14,437,828
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Diversified International Commingled Pool  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Diversified International Commingled Pool [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 35,813,694 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2010 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2010 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 1,506,481 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2015 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2015 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 2,103,739 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2020 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2020 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 32,210,864 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2025 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2025 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 43,005,870 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2030 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2030 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 94,369,432 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2035 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2035 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 66,514,408 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2040 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2040 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 73,035,798 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2045 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2045 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 50,525,069 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2050 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2050 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 46,999,402 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2055 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2055 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 33,913,109 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2060 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2060 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 19,176,813 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend 2065 Fund - Class R  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend 2065 Fund - Class R [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 5,384,742 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Freedom Blend Retirement Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Freedom Blend Retirement Fund [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 5,854,234 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Growth Company Commingled Pool  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Growth Company Commingled Pool [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 260,091,432 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Institutional Asset Management U.S. Bond Index Commingled Pool - Class D  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Institutional Asset Management U.S. Bond Index Commingled Pool - Class D [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 56,422,959 [1]
Investment, Identifier [Axis]: Collective trusts | FMTC | Fidelity Managed Income Portfolio Class II  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Managed Income Portfolio Class II [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 15,717,571 [1]
Investment, Identifier [Axis]: Collective trusts | Geode Capital Management Trust Company | Spartan 500 Index Pool - Class D  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] Spartan 500 Index Pool - Class D [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 209,744,757
Investment, Identifier [Axis]: Collective trusts | Geode Capital Management Trust Company | Spartan Extended Market Index Pool - Class D  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] Spartan Extended Market Index Pool - Class D [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 48,918,284
Investment, Identifier [Axis]: Collective trusts | Geode Capital Management Trust Company | Spartan Total International Index Pool - Class D  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] Spartan Total International Index Pool - Class D [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 30,435,899
Investment, Identifier [Axis]: Mutual funds | Allspring | Allspring Special Mid Cap Value Fund - Class R6  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] Allspring Special Mid Cap Value Fund – Class R6 [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 2,037,643
Investment, Identifier [Axis]: Mutual funds | American Funds | American Funds Washington Mutual Investors Fund - Class R6  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] American Funds Washington Mutual Investors Fund - Class R6 [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 35,543,879
Investment, Identifier [Axis]: Mutual funds | FMTC | Fidelity Investments Money Market Government Portfolio - Institutional Class  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments Money Market Government Portfolio - Institutional Class [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 38,507,479 [1]
Investment, Identifier [Axis]: Mutual funds | MassMutual | MassMutual Mid Cap Growth Fund - Class I  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member]
EBP, Investment, Issuer Name [Extensible Enumeration] MassMutual Mid Cap Growth Fund – Class I [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 15,886,287
Investment, Identifier [Axis]: Self-directed brokerage assets | FMTC | Self-Directed BrokerageLink  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Self-Directed BrokerageLink [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Self-Directed Brokerage Account [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 61,217,309 [1]
Investment, Identifier [Axis]: Waters Corporation Stock Fund | FMTC | Waters Corporation Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Waters Corporation Common Stock [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Waters Corporation Stock Fund [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 66,671,560 [1]
Investment, Identifier [Axis]: Waters Corporation Stock Fund | Fidelity Management Trust Company (FMTC) | Interest-Bearing Cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true [1]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Participant-Directed [Member] [1]
EBP, Investment, Issuer Name [Extensible Enumeration] Interest-Bearing Cash [Member] [1]
EBP, Investment, Current Value, Type [Extensible Enumeration] Waters Corporation Stock Fund [Member] [1]
EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value $ 1,902,288 [1]
Maximum [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Participant Loan, Interest Rate 8.50%
Minimum [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Participant Loan, Interest Rate 3.25%
[1] Party-in-interest