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Cover Page - shares
 6 Months Ended
Mar. 30, 2024
May 03, 2024
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 30, 2024  
Document Transition Report false  
Entity File Number 001-11593  
Entity Registrant Name Scotts Miracle-Gro Co  
Entity Central Index Key 0000825542  
Current Fiscal Year End Date --09-30  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Incorporation, State or Country Code OH  
Entity Tax Identification Number 31-1414921  
Entity Address, Address Line One 14111 Scottslawn Road,  
Entity Address, City or Town Marysville,  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 43041  
City Area Code 937  
Local Phone Number 644-0011  
Title of 12(b) Security Common Shares, $0.01 stated value  
Trading Symbol SMG  
Security Exchange Name NYSE  
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   56,799,090