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SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Premiums | $ 27,951 | $ 25,099 | $ 84,354 | $ 76,144
Services revenue | 1,103 | 1,016 | 3,265 | 2,993
Total revenues | 29,397 | 26,423 | 88,548 | 79,912
Investment income | 343 | 308 | 929 | 775
Benefits | 25,120 | 21,745 | 75,283 | 65,612
Operating costs | 3,339 | 3,271 | 9,529 | 9,361
Depreciation and amortization | 210 | 201 | 631 | 578
Total operating expenses | 28,669 | 25,217 | 85,443 | 75,551
Income from operations | 728 | 1,206 | 3,105 | 4,361
Interest expense | 169 | 114 | 496 | 347
Other expense (income), net | (92) | (6) | 26 | 40
Income (loss) before income taxes and equity in net losses | 651 | 1,098 | 2,583 | 3,974
Equity in net losses | (16) | (12) | (57) | (39)
Segment earnings (loss) | 635 | 1,086 | 2,526 | 3,935
Net loss (income) attributable to noncontrolling interests | 0 | 2 | 3 | 6
Segment earnings (loss) attributable to Humana | 635 | 1,088 | 2,529 | 3,941
Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 27,951 | 25,099 | 84,354 | 76,144
Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 24,490 | 21,825 | 74,768 | 66,064
Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 21,856 | 19,637 | 66,519 | 59,195
Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,913 | 1,695 | 5,840 | 5,192
Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 721 | 493 | 2,409 | 1,677
Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 85 | 842 | 493 | 2,810
Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 238 | 252 | 717 | 758
Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 217 | 185 | 620 | 546
Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 2,921 | 1,995 | 7,756 | 5,966
Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 1,103 | 1,016 | 3,265 | 2,993
Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 326 | 342 | 996 | 997
Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 319 | 214 | 882 | 605
Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 232 | 203 | 672 | 661
Services | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 12 | 55 | 44 | 190
Services | Military services and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 214 | 202 | 671 | 540
Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 29,054 | 26,115 | 87,619 | 79,137
Operating segments | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 28,370 | 25,511 | 85,594 | 77,289
Investment income | 192 | 154 | 522 | 385
Benefits | 25,319 | 21,976 | 75,752 | 66,096
Operating costs | 2,595 | 2,634 | 7,354 | 7,597
Depreciation and amortization | 182 | 179 | 553 | 516
Total operating expenses | 28,096 | 24,789 | 83,659 | 74,209
Income from operations | 274 | 722 | 1,935 | 3,080
Interest expense | 0 | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0 | 0
Income (loss) before income taxes and equity in net losses | 274 | 722 | 1,935 | 3,080
Equity in net losses | (1) | 0 | (2) | (2)
Segment earnings (loss) | 273 | 722 | 1,933 | 3,078
Net loss (income) attributable to noncontrolling interests | 0 | 3 | 3 | 7
Segment earnings (loss) attributable to Humana | 273 | 725 | 1,936 | 3,085
Operating segments | Insurance | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 27,951 | 25,099 | 84,354 | 76,144
Operating segments | Insurance | Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 24,490 | 21,825 | 74,768 | 66,064
Operating segments | Insurance | Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 21,856 | 19,637 | 66,519 | 59,195
Operating segments | Insurance | Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,913 | 1,695 | 5,840 | 5,192
Operating segments | Insurance | Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 721 | 493 | 2,409 | 1,677
Operating segments | Insurance | Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 85 | 842 | 493 | 2,810
Operating segments | Insurance | Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 238 | 252 | 717 | 758
Operating segments | Insurance | Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 217 | 185 | 620 | 546
Operating segments | Insurance | Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 2,921 | 1,995 | 7,756 | 5,966
Operating segments | Insurance | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 226 | 257 | 715 | 730
Operating segments | Insurance | Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | Insurance | Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | Insurance | Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | Insurance | Services | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 12 | 55 | 44 | 190
Operating segments | Insurance | Services | Military services and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 214 | 202 | 671 | 540
Operating segments | Insurance | Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 28,177 | 25,356 | 85,069 | 76,874
Operating segments | CenterWell |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 5,041 | 4,660 | 14,806 | 13,695
Investment income | 0 | 0 | 0 | 0
Benefits | 0 | 0 | 0 | 0
Operating costs | 4,602 | 4,207 | 13,638 | 12,526
Depreciation and amortization | 57 | 53 | 166 | 152
Total operating expenses | 4,659 | 4,260 | 13,804 | 12,678
Income from operations | 382 | 400 | 1,002 | 1,017
Interest expense | 2 | 1 | 4 | 2
Other expense (income), net | 0 | 0 | 0 | 0
Income (loss) before income taxes and equity in net losses | 380 | 399 | 998 | 1,015
Equity in net losses | (15) | (12) | (55) | (37)
Segment earnings (loss) | 365 | 387 | 943 | 978
Net loss (income) attributable to noncontrolling interests | 0 | (1) | 0 | (1)
Segment earnings (loss) attributable to Humana | 365 | 386 | 943 | 977
Operating segments | CenterWell | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 0 | 0 | 0 | 0
Operating segments | CenterWell | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 877 | 759 | 2,550 | 2,263
Operating segments | CenterWell | Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 326 | 342 | 996 | 997
Operating segments | CenterWell | Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 319 | 214 | 882 | 605
Operating segments | CenterWell | Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 232 | 203 | 672 | 661
Operating segments | CenterWell | Services | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | CenterWell | Services | Military services and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | CenterWell | Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 877 | 759 | 2,550 | 2,263
Eliminations/ Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (4,014) | (3,748) | (11,852) | (11,072)
Investment income | 151 | 154 | 407 | 390
Benefits | (199) | (231) | (469) | (484)
Operating costs | (3,858) | (3,570) | (11,463) | (10,762)
Depreciation and amortization | (29) | (31) | (88) | (90)
Total operating expenses | (4,086) | (3,832) | (12,020) | (11,336)
Income from operations | 72 | 84 | 168 | 264
Interest expense | 167 | 113 | 492 | 345
Other expense (income), net | (92) | (6) | 26 | 40
Income (loss) before income taxes and equity in net losses | (3) | (23) | (350) | (121)
Equity in net losses | 0 | 0 | 0 | 0
Segment earnings (loss) | (3) | (23) | (350) | (121)
Net loss (income) attributable to noncontrolling interests | 0 | 0 | 0 | 0
Segment earnings (loss) attributable to Humana | (3) | (23) | (350) | (121)
Eliminations/ Corporate | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1 | 1 | 3 | 30
Eliminations/ Corporate | Insurance | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Eliminations/ Corporate | Insurance | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1 | 1 | 3 | 30
Eliminations/ Corporate | CenterWell |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 4,164 | 3,901 | 12,256 | 11,432
Eliminations/ Corporate | CenterWell | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 2,701 | 2,594 | 7,963 | 7,848
Eliminations/ Corporate | CenterWell | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,463 | 1,307 | 4,293 | 3,584
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (4,165) | (3,902) | (12,259) | (11,462)
Intersegment Eliminations | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (2,701) | (2,594) | (7,963) | (7,848)
Intersegment Eliminations | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ (1,464) | $ (1,308) | $ (4,296) | $ (3,614)

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