Cover - shares	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-42188
Entity Registrant Name	CONCENTRA GROUP HOLDINGS PARENT, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	30-1006613
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
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CON
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		127,343,503
Entity Central Index Key	0002014596
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3