| Cover | Jul. 26, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 26, 2024 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-42188 |
| Entity Registrant Name | CONCENTRA GROUP HOLDINGS PARENT, INC. |
| Entity Central Index Key | 0002014596 |
| Entity Tax Identification Number | 30-1006613 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 4714 Gettysburg Road |
| Entity Address, Address Line Two | P.O. Box 2034 |
| Entity Address, City or Town | Mechanicsburg |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 17055 |
| City Area Code | 717 |
| Local Phone Number | 972-1100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | CON |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
