Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v3.8.0.1
Document And Entity Information - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2017
Feb. 16, 2018
Jun. 30, 2017
Document and Entity Information [Abstract]      
Entity Registrant Name CENTENE CORP    
Entity Central Index Key 0001071739    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Amendment Flag false    
Public Float     $ 13.8
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Common Stock, Shares Outstanding   173,495,595