v3.26.1
Cover Page - shares
 6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Document Information [Line Items]    
Entity Registrant Name Advantage Solutions Inc.  
Entity Central Index Key 0001776661  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Type 10-Q  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Document Quarterly Report true  
Document Transition Report false  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity File Number 001-38990  
Entity Interactive Data Current Yes  
Entity Incorporation State Country Code DE  
Entity Common Stock, Shares Outstanding   12,822,230
Entity Tax Identification Number 83-4629508  
Title of 12(b) Security Class A common stock, $0.0001 par value per share  
Trading Symbol ADV  
Security Exchange Name NASDAQ  
Entity Address, Address Line One 7676 Forsyth Boulevard.  
Entity Address, Address Line Two Fifth Floor  
Entity Address, City or Town St. Louis  
Entity Address, State or Province MO  
Entity Address, Postal Zip Code 63105  
City Area Code 314  
Local Phone Number 655-9333