| Cover | Aug. 04, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 4, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-38996 |
| Entity Registrant Name | PROSIGHT GLOBAL, INC. |
| Entity Central Index Key | 0001634038 |
| Entity Tax Identification Number | 35-2405664 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 412 Mt. Kemble Avenue |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Morristown |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07960 |
| City Area Code | 973 |
| Local Phone Number | 532-1900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | PROS |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
