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SEGMENT INFORMATION - Schedule of Segment Results (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Premiums revenue | $ 30,514 | $ 28,261
Services revenue | 1,334 | 1,062
Total revenues | 32,112 | 29,611
Investment income | 264 | 288
Benefits | 26,535 | 25,124
Operating costs | 3,380 | 3,042
Depreciation and amortization | 183 | 209
Total operating expenses | 30,098 | 28,375
Income from operations | 2,014 | 1,236
Product |  |
Segment Reporting Information [Line Items] |  |
Premiums revenue | 30,514 | 28,261
Service |  |
Segment Reporting Information [Line Items] |  |
Services revenue | 1,334 | 1,062
External Revenues |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 31,848 | 29,323
Operating Segments | Insurance |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 30,937 | 28,699
Investment income | 170 | 162
Benefits | 26,675 | 25,251
Operating costs | 2,534 | 2,364
Depreciation and amortization | 154 | 186
Total operating expenses | 29,363 | 27,801
Income from operations | 1,574 | 898
Operating Segments | CenterWell |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 5,095 | 4,818
Investment income | 0 | 0
Benefits | 0 | 0
Operating costs | 4,644 | 4,483
Depreciation and amortization | 59 | 53
Total operating expenses | 4,703 | 4,536
Income from operations | 392 | 282
Operating Segments | Product | Insurance |  |
Segment Reporting Information [Line Items] |  |
Premiums revenue | 30,514 | 28,261
Operating Segments | Product | CenterWell |  |
Segment Reporting Information [Line Items] |  |
Premiums revenue | 0 | 0
Operating Segments | Service | Insurance |  |
Segment Reporting Information [Line Items] |  |
Services revenue | 252 | 275
Operating Segments | Service | CenterWell |  |
Segment Reporting Information [Line Items] |  |
Services revenue | 1,082 | 787
Operating Segments | External Revenues | Insurance |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 30,766 | 28,536
Operating Segments | External Revenues | CenterWell |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 1,082 | 787
Eliminations/ Corporate |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (3,920) | (3,906)
Investment income | 94 | 126
Benefits | (140) | (127)
Operating costs | (3,798) | (3,805)
Depreciation and amortization | (30) | (30)
Total operating expenses | (3,968) | (3,962)
Income from operations | 48 | 56
Eliminations/ Corporate | Insurance |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 1 | 1
Eliminations/ Corporate | CenterWell |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 4,013 | 4,031
Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Total revenues | $ (4,014) | $ (4,032)

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