Annual report pursuant to Section 13 and 15(d)

Acquisitions - Proforma Information (unaudited) (Details)

v3.19.3.a.u2
Acquisitions - Proforma Information (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 23, 2020
Jul. 01, 2018
WellCare          
Business Acquisition [Line Items]          
Total revenues $ 102,379 $ 88,842      
Net earnings attributable to Centene Corporation $ 1,462 $ 1,211      
Diluted earnings per share (in usd per share) $ 2.47 $ 2.06      
Fidelis Care          
Business Acquisition [Line Items]          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles         $ 956
Total revenues   $ 65,792 $ 58,275    
Net earnings attributable to Centene Corporation   $ 1,342 $ 936    
Diluted earnings per share (in usd per share)   $ 3.22 $ 2.27    
Subsequent Event | WellCare          
Business Acquisition [Line Items]          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles       $ 7,000