Earnings Per Share - Summary of Reconciliation of Basic and Diluted Net Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (378,404)	$ (81,211)	$ (1,418,652)
Less: net income from continuing operations attributable to noncontrolling interest	0	2,346	3,757
Net loss from continuing operations attributable to stockholders of Advantage Solutions Inc.	(378,404)	(83,557)	(1,422,409)
Net income from discontinued operations, net of tax	53,634	20,829	41,350
Less: net income (loss) from discontinued operations attributable to noncontrolling interest	2,192	594	(546)
Net income from discontinued operations attributable to stockholders of Advantage Solutions Inc.	$ 51,442	$ 20,235	$ 41,896
Weighted average common shares - basic	321,515,982	323,677,515	318,682,548
Basic loss per common share from continuing operations attributable to stockholders of Advantage Solutions Inc.	$ (1.18)	$ (0.26)	$ (4.46)
Basic earnings per common share from discontinued operations attributable to stockholders of Advantage Solutions Inc.	$ 0.16	$ 0.06	$ 0.13
Weighted average common shares - diluted	321,515,982	323,677,515	318,682,548
Diluted loss per common share from continuing operations attributable to stockholders of Advantage Solutions Inc.	$ (1.18)	$ (0.26)	$ (4.46)
Diluted earnings per common share from discontinued operations attributable to stockholders of Advantage Solutions Inc.	$ 0.16	$ 0.06	$ 0.13