XML 17 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover - USD ($)
shares in Thousands, $ in Billions
 12 Months Ended
Dec. 31, 2024
Feb. 14, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-31826    
Entity Registrant Name Centene Corporation    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 42-1406317    
Entity Address, Address Line One 7700 Forsyth Boulevard    
Entity Address, City or Town St. Louis,    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 63105    
City Area Code 314    
Local Phone Number 725-4477    
Title of 12(b) Security Common Stock, $0.001 Par Value    
Trading Symbol CNC    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Public Float     $ 34.9
Entity Common Stock, Shares Outstanding   496,044  
Documents Incorporated by Reference Portions of the Proxy Statement for the registrant's 2025 annual meeting of stockholders are incorporated by reference in Part III, Items 10, 11, 12, 13 and 14.    
Entity Central Index Key 0001071739    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false