Cover - shares	9 Months Ended
	Sep. 30, 2025	Oct. 31, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
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	5080 Spectrum Drive
Entity Address, Address Line Two	Suite 1200W
Entity Address, City or Town	Addison
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75001
City Area Code	972
Local Phone Number	364-8000
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		128,170,202
Entity Central Index Key	0002014596
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3