| Document and Entity Information | Mar. 13, 2023 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001776661 |
| Document Type | 8-K |
| Document Period End Date | Mar. 13, 2023 |
| Entity Registrant Name | Advantage Solutions Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38990 |
| Entity Tax Identification Number | 83-4629508 |
| Entity Address, Address Line One | 15310 Barranca Parkway |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Irvine |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92618 |
| City Area Code | (949) |
| Local Phone Number | 797-2900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A common stock, $0.0001 par value per share |
| Trading Symbol | ADV |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants exercisable for one share of Class A common stock at an exercise price of $11.50 per share |
| Trading Symbol | ADVWW |
| Security Exchange Name | NASDAQ |
