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SEGMENT INFORMATION - Schedule of Segment Reporting Information, By Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Premiums revenue | $ 112,104 | $ 101,272 | $ 87,712
Services revenue | 4,431 | 4,033 | 4,776
Total revenues | 117,761 | 106,374 | 92,870
Investment income | 1,226 | 1,069 | 382
Benefits | 100,664 | 88,394 | 75,690
Operating costs | 13,696 | 13,188 | 12,671
Depreciation and amortization | 839 | 779 | 709
Total operating expenses | 115,199 | 102,361 | 89,070
Income (loss) from operations | 2,562 | 4,013 | 3,800
Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums revenue | 112,104 | 101,272 | 87,712
Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 4,431 | 4,033 | 4,776
External Revenues |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 116,535 | 105,305 | 92,488
Operating Segments | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 113,764 | 102,854 | 88,841
Investment income | 690 | 551 | 223
Benefits | 101,299 | 89,100 | 75,934
Operating costs | 10,443 | 10,408 | 9,251
Depreciation and amortization | 733 | 692 | 634
Total operating expenses | 112,475 | 100,200 | 85,819
Income (loss) from operations | 1,289 | 2,654 | 3,022
Operating Segments | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 19,936 | 18,405 | 17,307
Investment income | 0 | 0 | 8
Benefits | 0 | 0 | 0
Operating costs | 18,383 | 16,791 | 15,835
Depreciation and amortization | 224 | 210 | 181
Total operating expenses | 18,607 | 17,001 | 16,016
Income (loss) from operations | 1,329 | 1,404 | 1,291
Operating Segments | Products | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums revenue | 112,104 | 101,272 | 87,712
Operating Segments | Products | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums revenue | 0 | 0 | 0
Operating Segments | Services | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 966 | 1,000 | 850
Operating Segments | Services | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 3,465 | 3,033 | 3,926
Operating Segments | External Revenues | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 113,070 | 102,272 | 88,562
Operating Segments | External Revenues | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 3,465 | 3,033 | 3,926
Eliminations/ Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | (15,939) | (14,885) | (13,278)
Investment income | 536 | 518 | 151
Benefits | (635) | (706) | (244)
Operating costs | (15,130) | (14,011) | (12,415)
Depreciation and amortization | (118) | (123) | (106)
Total operating expenses | (15,883) | (14,840) | (12,765)
Income (loss) from operations | (56) | (45) | (513)
Eliminations/ Corporate | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 4 | 31 | 56
Eliminations/ Corporate | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 16,471 | 15,372 | 13,373
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ (16,475) | $ (15,403) | $ (13,429)

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- Definition The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 + Details
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