XML 20 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2018
Feb. 22, 2019
Jun. 30, 2018
Document And Entity Information [Abstract]      
Document Type 10-K/A    
Amendment Flag true    
AmendmentDescription On February 26, 2019, Waters Corporation (the “Company”) filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2018 (the “Original Form 10-K”). This Amendment No. 1 (the “Amendment”) amends the Original 10-K to correct a typographical error in Part II Item 8, Financial Statements and Supplementary Data, to remove the brackets on the 2018 increase in other liabilities on the Consolidated Statements of Cash Flows appearing on page 55. Except as stated above, this Amendment does not amend any other information set forth in the Original Form 10-K.    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol WAT    
Entity Registrant Name WATERS CORP /DE/    
Entity Central Index Key 0001000697    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Common Stock, Shares Outstanding   71,512,391  
Entity Public Float     $ 14,912,684,699