v3.26.1
Segment Reporting - Reconciliation of Financial Measures of Segments to Consolidated Totals (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Revenues from external customers $ 99,852 $ 94,068
Net investment income 574 520
Total revenues 100,426 94,588
Less: Net realized capital gains (losses) (16) (21)
Cost of products sold 55,444 51,057
Health care costs 29,358 29,135
Reconciliation of principal measure of segment performance to consolidated operating income:    
Amortization of intangible assets 442 499
Net realized capital losses 16 21
Acquisition-related transaction and integration costs 12 45
Litigation charges   387
Loss on Accountable Care assets   247
Office real estate optimization charges   6
Operating income 4,680 3,374
Interest expense (774) (785)
Other income 32 28
Income before income tax provision 3,938 2,617
Depreciation and amortization 1,115 1,154
Health Care Benefits    
Segment Reporting Information [Line Items]    
Revenues from external customers 35,477 34,405
Net investment income 462 387
Reconciliation of principal measure of segment performance to consolidated operating income:    
Depreciation and amortization 340 405
Health Services    
Segment Reporting Information [Line Items]    
Revenues from external customers 42,609 38,096
Net investment income 0 14
Reconciliation of principal measure of segment performance to consolidated operating income:    
Loss on Accountable Care assets   247
Depreciation and amortization 258 261
Pharmacy & Consumer Wellness    
Segment Reporting Information [Line Items]    
Revenues from external customers 21,752 21,553
Net investment income 0 0
Reconciliation of principal measure of segment performance to consolidated operating income:    
Depreciation and amortization 406 384
Corporate/ Other    
Segment Reporting Information [Line Items]    
Revenues from external customers 14 14
Net investment income 112 119
Reconciliation of principal measure of segment performance to consolidated operating income:    
Depreciation and amortization 111 104
Intersegment Eliminations    
Segment Reporting Information [Line Items]    
Net investment income 0 0
Total revenues (15,897) (15,729)
Intersegment Eliminations | Health Care Benefits    
Segment Reporting Information [Line Items]    
Total revenues (32) (18)
Intersegment Eliminations | Health Services    
Segment Reporting Information [Line Items]    
Total revenues (5,628) (5,352)
Intersegment Eliminations | Pharmacy & Consumer Wellness    
Segment Reporting Information [Line Items]    
Total revenues (10,237) (10,359)
Operating Segments and Corporate/ Other    
Segment Reporting Information [Line Items]    
Total revenues 116,323 110,317
Adjusted operating income (loss) 5,150 4,579
Operating Segments | Health Care Benefits    
Segment Reporting Information [Line Items]    
Net investment income 462 387
Total revenues 35,971 34,810
Less: Net realized capital gains (losses) 1 (21)
Cost of products sold 0 0
Health care costs 28,579 28,637
Operating expenses, excluding other segment items 4,350 4,201
Adjusted operating income (loss) 3,041 1,993
Reconciliation of principal measure of segment performance to consolidated operating income:    
Net realized capital losses (1) 21
Operating Segments | Health Services    
Segment Reporting Information [Line Items]    
Net investment income 0 14
Total revenues 48,237 43,462
Less: Net realized capital gains (losses) 0 15
Cost of products sold 44,719 40,115
Health care costs 1,302 1,047
Operating expenses, excluding other segment items 727 682
Adjusted operating income (loss) 1,489 1,603
Reconciliation of principal measure of segment performance to consolidated operating income:    
Net realized capital losses 0 (15)
Co-payments 3,800 3,700
Operating Segments | Pharmacy & Consumer Wellness    
Segment Reporting Information [Line Items]    
Net investment income 0 0
Total revenues 31,989 31,912
Less: Net realized capital gains (losses) 0 0
Cost of products sold 25,790 25,804
Health care costs 0 0
Operating expenses, excluding other segment items 5,002 4,795
Adjusted operating income (loss) 1,197 1,313
Reconciliation of principal measure of segment performance to consolidated operating income:    
Net realized capital losses 0 0
Corporate/ Other | Corporate/ Other    
Segment Reporting Information [Line Items]    
Net investment income 112 119
Total revenues 126 133
Less: Net realized capital gains (losses) (17) (15)
Cost of products sold 0 0
Health care costs 46 46
Operating expenses, excluding other segment items 674 432
Adjusted operating income (loss) (577) (330)
Reconciliation of principal measure of segment performance to consolidated operating income:    
Net realized capital losses $ 17 $ 15