| Document and Entity Information | Jan. 07, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001739936 |
| Document Type | 8-K |
| Document Period End Date | Jan. 7, 2022 |
| Entity Registrant Name | Momentive Global Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38664 |
| Entity Tax Identification Number | 80-0765058 |
| Entity Address, Address Line One | One Curiosity Way |
| Entity Address, City or Town | San Mateo |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94403 |
| City Area Code | (650) |
| Local Phone Number | 543-8400 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value$0.00001 per share |
| Trading Symbol | MNTV |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
