v3.24.2
Segment Information - Financial Data by Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Segment Reporting Information [Line Items]        
Premiums $ 35,416 $ 36,589 $ 71,112 $ 72,457
Operating revenue 43,223 43,377 85,496 85,275
Operating gain (loss) 2,765 2,628 5,781 5,459
Depreciation and amortization of property and equipment 0 0 0 0
Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 5,530 4,859 10,029 8,881
Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 2,277 1,929 4,355 3,937
Eliminations        
Segment Reporting Information [Line Items]        
Premiums (474) (73) (568) (149)
Operating revenue (7,377) (6,805) (14,565) (13,762)
Operating gain (loss) 0 0 0 0
Depreciation and amortization of property and equipment 0 0 0
Eliminations | Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 0
Eliminations | Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 0
Health Benefits | Operating Segments        
Segment Reporting Information [Line Items]        
Premiums 35,096 36,233 70,478 71,767
Operating revenue 37,159 38,000 74,417 75,280
Operating gain (loss) 2,145 2,138 4,432 4,287
Depreciation and amortization of property and equipment 0 0 0 0
Health Benefits | Operating Segments | Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 0 0 0 0
Health Benefits | Operating Segments | Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 2,063 1,767 3,939 3,513
Total | Operating Segments        
Segment Reporting Information [Line Items]        
Premiums 794 429 1,202 839
Operating revenue 13,319 12,070 25,395 23,554
Operating gain (loss) 705 653 1,518 1,394
Depreciation and amortization of property and equipment 0 0 0 0
Total | Operating Segments | Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 5,530 4,859 10,029 8,881
Total | Operating Segments | Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 197 201 395 409
CarelonRx | Operating Segments        
Segment Reporting Information [Line Items]        
Premiums 0 0 0 0
Operating revenue 8,774 8,466 16,841 16,490
Operating gain (loss) 497 496 1,020 1,008
Depreciation and amortization of property and equipment 0 0 0 0
CarelonRx | Operating Segments | Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 5,530 4,859 10,029 8,881
CarelonRx | Operating Segments | Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 1 0 2 0
Carelon Services | Operating Segments        
Segment Reporting Information [Line Items]        
Premiums 794 429 1,202 839
Operating revenue 4,545 3,604 8,554 7,064
Operating gain (loss) 208 157 498 386
Depreciation and amortization of property and equipment 0 0 0 0
Carelon Services | Operating Segments | Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 0 0 0 0
Carelon Services | Operating Segments | Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 196 201 393 409
Corporate & Other | Operating Segments        
Segment Reporting Information [Line Items]        
Premiums 0 0 0 0
Operating revenue 122 112 249 203
Operating gain (loss) (85) (163) (169) (222)
Depreciation and amortization of property and equipment 234 221 456 439
Corporate & Other | Operating Segments | Product revenue        
Segment Reporting Information [Line Items]        
Product and service revenue 0 0 0 0
Corporate & Other | Operating Segments | Service fees        
Segment Reporting Information [Line Items]        
Product and service revenue 17 (39) 21 15
Operating revenue - unaffiliated        
Segment Reporting Information [Line Items]        
Operating revenue 43,223 43,377 85,496 85,275
Operating revenue - unaffiliated | Eliminations        
Segment Reporting Information [Line Items]        
Operating revenue (474) (73) (568) (149)
Operating revenue - unaffiliated | Health Benefits | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 37,159 38,000 74,417 75,280
Operating revenue - unaffiliated | Total | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 6,521 5,489 11,626 10,129
Operating revenue - unaffiliated | CarelonRx | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 5,531 4,859 10,031 8,881
Operating revenue - unaffiliated | Carelon Services | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 990 630 1,595 1,248
Operating revenue - unaffiliated | Corporate & Other | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 17 (39) 21 15
Operating revenue - affiliated        
Segment Reporting Information [Line Items]        
Operating revenue 0 0 0 0
Operating revenue - affiliated | Eliminations        
Segment Reporting Information [Line Items]        
Operating revenue (6,903) (6,732) (13,997) (13,613)
Operating revenue - affiliated | Health Benefits | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 0 0 0 0
Operating revenue - affiliated | Total | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 6,798 6,581 13,769 13,425
Operating revenue - affiliated | CarelonRx | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 3,243 3,607 6,810 7,609
Operating revenue - affiliated | Carelon Services | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue 3,555 2,974 6,959 5,816
Operating revenue - affiliated | Corporate & Other | Operating Segments        
Segment Reporting Information [Line Items]        
Operating revenue $ 105 $ 151 $ 228 $ 188