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Earnings Per Share - Summary of Reconciliation of Basic and Diluted Net Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Earnings Per Share [Abstract]      
Net (loss) income attributable to stockholders of Advantage Solutions Inc. $ (1,380,502) $ 54,494 $ (175,806)
Weighted average common shares - basic 318,682,548 318,198,860 223,227,833
Basic (loss) earnings per common share $ (4.33) $ 0.17 $ (0.79)
Basic 318,682,548 318,198,860 223,227,833
Performance Stock Units 0 1,998,848 0
Restricted Stock Units 0 559,649  
Warrants 0 4,468 0
Employee stock purchase plan and stock options 0 242,931 0
Weighted average common shares - diluted 318,682,548 321,004,756 223,227,833
Diluted (loss) earnings per common share $ (4.33) $ 0.17 $ (0.79)