v3.25.0.1
Segment Reporting - Reconciliation of Financial Measures of Segments to Consolidated Totals (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2024
USD ($)
Sep. 30, 2024
store
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Segment Reporting Information [Line Items]          
Revenues from external customers     $ 370,656 $ 356,623 $ 321,629
Net investment income (loss)     2,153 1,153 838
Total revenues     372,809 357,776 322,467
Less: Net realized capital gains (losses)     117 (497) (320)
Cost of products sold     206,287 217,098 196,892
Health care costs     115,121 86,247 71,073
Reconciliation of principal measure of segment performance to consolidated operating income:          
Amortization of intangible assets     2,025 1,905 1,785
Net realized capital losses     (117) 497 320
Acquisition-related transaction and integration costs     243 487  
Restructuring charges     1,179 507 0
Office real estate optimization charges     30 46 117
Opioid litigation charges     100 0 5,803
Loss on assets held for sale     0 349 2,533
Gain on sale of subsidiaries     0 0 (475)
Operating income     8,516 13,743 7,954
Interest expense     2,958 2,658 2,287
Gain on early extinguishment of debt     (491) 0 0
Other income     (99) (88) (169)
Income before income tax provision     6,148 11,173 5,836
Depreciation and amortization     4,597 4,366 4,224
Number of stores, planned closure | store   271      
Senior Notes          
Reconciliation of principal measure of segment performance to consolidated operating income:          
Gain on early extinguishment of debt $ (491)        
Principal amount of debt repaid $ 2,600        
Health Care Benefits          
Segment Reporting Information [Line Items]          
Revenues from external customers     129,120 104,800 90,798
Net investment income (loss)     1,473 765 476
Reconciliation of principal measure of segment performance to consolidated operating income:          
Depreciation and amortization     1,599 1,572 1,579
Health Services          
Segment Reporting Information [Line Items]          
Revenues from external customers     158,016 174,018 157,968
Net investment income (loss)     285 (1) 0
Reconciliation of principal measure of segment performance to consolidated operating income:          
Depreciation and amortization     1,059 880 519
Pharmacy & Consumer Wellness          
Segment Reporting Information [Line Items]          
Revenues from external customers     83,464 77,748 72,739
Net investment income (loss)     0 (5) (44)
Reconciliation of principal measure of segment performance to consolidated operating income:          
Depreciation and amortization     1,543 1,549 1,889
Corporate/ Other          
Segment Reporting Information [Line Items]          
Revenues from external customers     56 57 124
Net investment income (loss)     395 394 406
Reconciliation of principal measure of segment performance to consolidated operating income:          
Depreciation and amortization     396 365 237
Intersegment Eliminations          
Segment Reporting Information [Line Items]          
Net investment income (loss)     0 0 0
Total revenues     (56,412) (51,927) (47,585)
Intersegment Eliminations | Health Care Benefits          
Segment Reporting Information [Line Items]          
Total revenues     (72) (81) (76)
Intersegment Eliminations | Health Services          
Segment Reporting Information [Line Items]          
Total revenues     (15,304) (12,826) (11,608)
Intersegment Eliminations | Pharmacy & Consumer Wellness          
Segment Reporting Information [Line Items]          
Total revenues     (41,036) (39,020) (35,901)
Operating Segments and Corporate Non-Segment          
Segment Reporting Information [Line Items]          
Total revenues     429,221 409,703 370,052
Adjusted operating income (loss)     11,976 17,534 18,037
Operating Segments | Health Care Benefits          
Segment Reporting Information [Line Items]          
Net investment income (loss)     1,473 765 476
Total revenues     130,665 105,646 91,350
Less: Net realized capital gains (losses)     (97) (402) (225)
Cost of products sold     0 0 0
Health care costs     113,659 85,504 71,473
Other segment items     16,796 14,967 13,764
Adjusted operating income (loss)     307 5,577 6,338
Reconciliation of principal measure of segment performance to consolidated operating income:          
Net realized capital losses     97 402 225
Operating Segments | Health Services          
Segment Reporting Information [Line Items]          
Net investment income (loss)     285 (1) 0
Total revenues     173,605 186,843 169,576
Less: Net realized capital gains (losses)     289 0 0
Cost of products sold     160,036 175,424 160,738
Health care costs     3,407 1,607 0
Other segment items     2,630 2,500 2,057
Adjusted operating income (loss)     7,243 7,312 6,781
Reconciliation of principal measure of segment performance to consolidated operating income:          
Net realized capital losses     (289) 0 0
Copayments     11,400 13,700 12,600
Operating Segments | Pharmacy & Consumer Wellness          
Segment Reporting Information [Line Items]          
Net investment income (loss)     0 (5) (44)
Total revenues     124,500 116,763 108,596
Less: Net realized capital gains (losses)     0 (5) (44)
Cost of products sold     99,337 91,447 82,063
Health care costs     0 0 0
Other segment items     19,389 19,358 20,046
Adjusted operating income (loss)     5,774 5,963 6,531
Reconciliation of principal measure of segment performance to consolidated operating income:          
Net realized capital losses     0 5 44
Corporate/ Other | Corporate/ Other          
Segment Reporting Information [Line Items]          
Net investment income (loss)     395 394 406
Total revenues     451 451 530
Less: Net realized capital gains (losses)     (75) (90) (51)
Cost of products sold     0 1 42
Health care costs     187 210 249
Other segment items     1,687 1,648 1,903
Adjusted operating income (loss)     (1,348) (1,318) (1,613)
Reconciliation of principal measure of segment performance to consolidated operating income:          
Net realized capital losses     $ 75 $ 90 $ 51