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Segment Reporting - Reconciliation of Financial Measures of Segments to Consolidated Totals (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Revenues from external customers | $ 94,068 | $ 87,983
Net investment income | 520 | 454
Total revenues | 94,588 | 88,437
Less: Net realized capital gains (losses) | (21) | (18)
Cost of products sold | 51,057 | 48,073
Health care costs | 29,135 | 27,803
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Amortization of intangible assets | 499 | 508
Net realized capital losses | 21 | 18
Acquisition-related transaction and integration costs | 45 | 60
Loss on Accountable Care assets | 247 |
Office real estate optimization charges | 6 |
Litigation charge | 387 | 100
Operating income | 3,374 | 2,271
Interest expense | 785 | 716
Other income | (28) | (25)
Income before income tax provision | 2,617 | 1,580
Depreciation and amortization | 1,154 | 1,138
Health Care Benefits |  |
Segment Reporting Information [Line Items] |  |
Revenues from external customers | 34,405 | 31,865
Net investment income | 387 | 353
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Depreciation and amortization | 405 | 392
Health Services |  |
Segment Reporting Information [Line Items] |  |
Revenues from external customers | 38,096 | 36,466
Net investment income | 14 | 0
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Loss on Accountable Care assets | 247 |
Depreciation and amortization | 261 | 261
Pharmacy & Consumer Wellness |  |
Segment Reporting Information [Line Items] |  |
Revenues from external customers | 21,553 | 19,638
Net investment income | 0 | 0
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Depreciation and amortization | 384 | 388
Corporate/ Other |  |
Segment Reporting Information [Line Items] |  |
Revenues from external customers | 14 | 14
Net investment income | 119 | 101
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Depreciation and amortization | 104 | 97
Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Net investment income | 0 | 0
Total revenues | (15,729) | (12,924)
Intersegment Eliminations | Health Care Benefits |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (18) | (18)
Intersegment Eliminations | Health Services |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (5,352) | (3,819)
Intersegment Eliminations | Pharmacy & Consumer Wellness |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (10,359) | (9,087)
Operating Segments and Corporate/ Other |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 110,317 | 101,361
Adjusted operating income (loss) | 4,579 | 2,957
Operating Segments | Health Care Benefits |  |
Segment Reporting Information [Line Items] |  |
Net investment income | 387 | 353
Total revenues | 34,810 | 32,236
Less: Net realized capital gains (losses) | (21) | (10)
Cost of products sold | 0 | 0
Health care costs | 28,637 | 27,458
Other segment items | 4,201 | 4,056
Adjusted operating income (loss) | 1,993 | 732
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Net realized capital losses | 21 | 10
Operating Segments | Health Services |  |
Segment Reporting Information [Line Items] |  |
Net investment income | 14 | 0
Total revenues | 43,462 | 40,285
Less: Net realized capital gains (losses) | 15 | 0
Cost of products sold | 40,115 | 37,532
Health care costs | 1,047 | 701
Other segment items | 682 | 689
Adjusted operating income (loss) | 1,603 | 1,363
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Net realized capital losses | (15) | 0
Co-payments | 3,700 | 3,400
Operating Segments | Pharmacy & Consumer Wellness |  |
Segment Reporting Information [Line Items] |  |
Net investment income | 0 | 0
Total revenues | 31,912 | 28,725
Less: Net realized capital gains (losses) | 0 | 0
Cost of products sold | 25,804 | 22,760
Health care costs | 0 | 0
Other segment items | 4,795 | 4,788
Adjusted operating income (loss) | 1,313 | 1,177
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 | 119 | 101
Total revenues | 133 | 115
Less: Net realized capital gains (losses) | (15) | (8)
Cost of products sold | 0 | 0
Health care costs | 46 | 47
Other segment items | 432 | 391
Adjusted operating income (loss) | (330) | (315)
Reconciliation of principal measure of segment performance to consolidated operating income: |  |
Net realized capital losses | $ 15 | $ 8

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