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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 28, 2019
Cover page.      
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Entity File Number 1-04851    
Entity Registrant Name THE SHERWIN-WILLIAMS COMPANY    
Entity Incorporation, State or Country Code OH    
Entity Tax Identification Number 34-0526850    
Entity Address, Address Line One 101 West Prospect Avenue    
Entity Address, City or Town Cleveland,    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44115-1075    
City Area Code 216    
Local Phone Number 566-2000    
Title of 12(b) Security Common Stock, Par Value $1.00    
Trading Symbol SHW    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   92,227,704  
Entity Public Float     $ 42,201,407,338
Documents Incorporated by Reference Portions of our Proxy Statement for the 2020 Annual Meeting of Shareholders (“Proxy Statement”) to be filed with the Securities and Exchange Commission within 120 days of our fiscal year ended December 31, 2019 are incorporated by reference into Part III of this report.    
Annual Report true    
Transition Report false    
Entity Central Index Key 0000089800    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31