Cover - shares	9 Months Ended
	Sep. 30, 2025	Nov. 07, 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	001-42180
Registrant Name	Ardent Health, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	61-1764793
Entity Address, Address Line One	340 Seven Springs Way
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Brentwood
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37027
City Area Code	615
Local Phone Number	296-3000
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	ARDT
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		143,187,681
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Central Index Key	0001756655
Current Fiscal Year End Date	--12-31