Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v3.21.1
Segment Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2021
USD ($)
segment
Mar. 31, 2020
USD ($)
Segment Reporting [Abstract]    
Number of operating segments | segment 2  
Segment Reporting Information [Line Items]    
Total revenues $ 29,983 $ 26,025
Earnings from operations 1,054 188
Eliminations    
Segment Reporting Information [Line Items]    
Total revenues (2,887) (2,538)
Managed Care    
Segment Reporting Information [Line Items]    
Total revenues 28,603 24,937
Earnings from operations 956 217
Managed Care | Operating Segments    
Segment Reporting Information [Line Items]    
Total revenues 28,602 24,936
Managed Care | Eliminations    
Segment Reporting Information [Line Items]    
Total revenues 1 1
Specialty Services    
Segment Reporting Information [Line Items]    
Total revenues 4,267 3,626
Earnings from operations 98 (29)
Specialty Services | Operating Segments    
Segment Reporting Information [Line Items]    
Total revenues 1,381 1,089
Specialty Services | Eliminations    
Segment Reporting Information [Line Items]    
Total revenues $ 2,886 $ 2,537