v3.25.1
Segment Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2025
USD ($)
segment
Mar. 31, 2024
USD ($)
Segment Reporting [Abstract]    
Number of operating segments | segment 4  
Segment Reporting Information [Line Items]    
Premium and service revenues $ 42,489 $ 36,337
Premium tax 4,131 4,070
Total external revenues 46,620 40,407
Total revenues 46,620 40,407
Medical costs 36,503 30,932
Cost of services 698 669
Other operating expenses 7,885 7,700
Other income (expense) 212 367
Earnings before income tax 1,746 1,473
Gross margin 5,288 4,736
Operating Segments    
Segment Reporting Information [Line Items]    
Total revenues 4,164 4,080
Eliminations    
Segment Reporting Information [Line Items]    
Total revenues (4,164) (4,080)
Premium    
Segment Reporting Information [Line Items]    
Premium and service revenues 41,712 35,529
Service    
Segment Reporting Information [Line Items]    
Premium and service revenues 777 808
Premium and service revenues    
Segment Reporting Information [Line Items]    
Premium and service revenues 42,489 36,337
Medicaid    
Segment Reporting Information [Line Items]    
Total revenues 26,430 25,530
Medical costs 20,843 19,495
Cost of services 24 21
Gross margin 1,432 1,944
Medicaid | Operating Segments    
Segment Reporting Information [Line Items]    
Premium tax 4,131 4,070
Total external revenues 26,430 25,530
Total revenues 0 0
Medicaid | Eliminations    
Segment Reporting Information [Line Items]    
Total revenues 0 0
Medicaid | Premium | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 22,275 21,438
Medicaid | Service | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 24 22
Medicaid | Premium and service revenues | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 22,299 21,460
Medicare    
Segment Reporting Information [Line Items]    
Total revenues 8,759 5,935
Medical costs 7,555 5,389
Cost of services 0 0
Gross margin 1,204 546
Medicare | Operating Segments    
Segment Reporting Information [Line Items]    
Premium tax 0 0
Total external revenues 8,759 5,935
Total revenues 0 0
Medicare | Eliminations    
Segment Reporting Information [Line Items]    
Total revenues 0 0
Medicare | Premium | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 8,759 5,935
Medicare | Service | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 0 0
Medicare | Premium and service revenues | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 8,759 5,935
Commercial    
Segment Reporting Information [Line Items]    
Total revenues 10,149 7,751
Medical costs 7,607 5,680
Cost of services 0 0
Gross margin 2,542 2,071
Commercial | Operating Segments    
Segment Reporting Information [Line Items]    
Premium tax 0 0
Total external revenues 10,149 7,751
Total revenues 0 0
Commercial | Eliminations    
Segment Reporting Information [Line Items]    
Total revenues 0 0
Commercial | Premium    
Segment Reporting Information [Line Items]    
Premium and service revenues 10,148 7,750
Commercial | Service | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 1 1
Commercial | Premium and service revenues | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 10,149 7,751
Other/Eliminations    
Segment Reporting Information [Line Items]    
Total revenues 1,282 1,191
Medical costs 498 368
Cost of services 674 648
Gross margin 110 175
Other/Eliminations | Operating Segments    
Segment Reporting Information [Line Items]    
Premium tax 0 0
Total external revenues 1,282 1,191
Total revenues 4,164 4,080
Other/Eliminations | Eliminations    
Segment Reporting Information [Line Items]    
Total revenues (4,164) (4,080)
Other/Eliminations | Premium | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 530 406
Other/Eliminations | Service | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues 752 785
Other/Eliminations | Premium and service revenues | Operating Segments    
Segment Reporting Information [Line Items]    
Premium and service revenues $ 1,282 $ 1,191