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Document and Entity Information Document
Mar. 17, 2021
Aug. 25, 2020
Entity Information [Line Items]    
Entity Central Index Key   0000825542
Amendment Flag   false
Entity Emerging Growth Company false  
Security Exchange Name NYSE  
Trading Symbol SMG  
Title of 12(b) Security Common Shares, $0.01 stated value  
Pre-commencement Issuer Tender Offer false  
Pre-commencement Tender Offer false  
Soliciting Material false  
Written Communications false  
Local Phone Number 644-0011  
City Area Code 937  
Entity Address, Postal Zip Code 43041  
Entity Address, State or Province OH  
Entity Address, City or Town Marysville  
Entity Address, Address Line One 14111 Scottslawn Road  
Entity Tax Identification Number 31-1414921  
Entity File Number 001-11593  
Entity Incorporation, State or Country Code OH  
Entity Registrant Name Scotts Miracle-Gro Co  
Document Period End Date Mar. 17, 2021  
Document Type 8-K