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SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Premiums | $ 28,142 | $ 25,495 | $ 56,403 | $ 51,045
Services revenue | 1,100 | 978 | 2,162 | 1,977
Total revenues | 29,540 | 26,747 | 59,151 | 53,489
Investment income | 298 | 274 | 586 | 467
Benefits | 25,039 | 22,009 | 50,163 | 43,867
Operating costs | 3,148 | 3,111 | 6,190 | 6,090
Depreciation and amortization | 212 | 191 | 421 | 377
Total operating expenses | 28,399 | 25,311 | 56,774 | 50,334
Income from operations | 1,141 | 1,436 | 2,377 | 3,155
Interest expense | 168 | 120 | 327 | 233
Other expense (income), net | 55 | 54 | 118 | 46
Income (loss) before income taxes and equity in net losses | 918 | 1,262 | 1,932 | 2,876
Equity in net earnings (losses) | (17) | (10) | (41) | (27)
Segment earnings (loss) | 901 | 1,252 | 1,891 | 2,849
Net loss attributable to noncontrolling interests | 1 | 3 | 3 | 4
Segment earnings (loss) attributable to Humana | 902 | 1,255 | 1,894 | 2,853
Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 28,142 | 25,495 | 56,403 | 51,045
Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 25,020 | 22,049 | 50,278 | 44,239
Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 22,215 | 19,749 | 44,663 | 39,558
Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,938 | 1,732 | 3,927 | 3,497
Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 867 | 568 | 1,688 | 1,184
Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 152 | 950 | 408 | 1,968
Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 240 | 252 | 479 | 506
Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 206 | 182 | 403 | 361
Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 2,524 | 2,062 | 4,835 | 3,971
Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 1,100 | 978 | 2,162 | 1,977
Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 335 | 341 | 670 | 655
Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 322 | 190 | 563 | 391
Services | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 8 | 64 | 32 | 135
Services | Military services and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 206 | 167 | 457 | 338
Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 229 | 216 | 440 | 458
Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 29,242 | 26,473 | 58,565 | 53,022
Operating segments | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 28,525 | 25,875 | 57,224 | 51,778
Investment income | 168 | 134 | 330 | 231
Benefits | 25,182 | 22,127 | 50,433 | 44,120
Operating costs | 2,395 | 2,545 | 4,759 | 4,963
Depreciation and amortization | 185 | 172 | 371 | 337
Total operating expenses | 27,762 | 24,844 | 55,563 | 49,420
Income from operations | 763 | 1,031 | 1,661 | 2,358
Interest expense | 0 | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0 | 0
Income (loss) before income taxes and equity in net losses | 763 | 1,031 | 1,661 | 2,358
Equity in net earnings (losses) | 1 | 1 | (1) | (2)
Segment earnings (loss) | 764 | 1,032 | 1,660 | 2,356
Net loss attributable to noncontrolling interests | 1 | 3 | 3 | 4
Segment earnings (loss) attributable to Humana | 765 | 1,035 | 1,663 | 2,360
Operating segments | Insurance | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 28,142 | 25,495 | 56,403 | 51,045
Operating segments | Insurance | Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 25,020 | 22,049 | 50,278 | 44,239
Operating segments | Insurance | Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 22,215 | 19,749 | 44,663 | 39,558
Operating segments | Insurance | Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,938 | 1,732 | 3,927 | 3,497
Operating segments | Insurance | Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 867 | 568 | 1,688 | 1,184
Operating segments | Insurance | Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 152 | 950 | 408 | 1,968
Operating segments | Insurance | Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 240 | 252 | 479 | 506
Operating segments | Insurance | Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 206 | 182 | 403 | 361
Operating segments | Insurance | Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 2,524 | 2,062 | 4,835 | 3,971
Operating segments | Insurance | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 214 | 231 | 489 | 473
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 | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 8 | 64 | 32 | 135
Operating segments | Insurance | Services | Military services and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 206 | 167 | 457 | 338
Operating segments | Insurance | Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | Insurance | Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 28,356 | 25,726 | 56,892 | 51,518
Operating segments | CenterWell |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 4,947 | 4,530 | 9,765 | 9,035
Investment income | 0 | 0 | 0 | 0
Benefits | 0 | 0 | 0 | 0
Operating costs | 4,553 | 4,193 | 9,036 | 8,319
Depreciation and amortization | 56 | 50 | 109 | 99
Total operating expenses | 4,609 | 4,243 | 9,145 | 8,418
Income from operations | 338 | 287 | 620 | 617
Interest expense | 1 | 1 | 2 | 1
Other expense (income), net | 0 | 0 | 0 | 0
Income (loss) before income taxes and equity in net losses | 337 | 286 | 618 | 616
Equity in net earnings (losses) | (18) | (11) | (40) | (25)
Segment earnings (loss) | 319 | 275 | 578 | 591
Net loss attributable to noncontrolling interests | 0 | 0 | 0 | 0
Segment earnings (loss) attributable to Humana | 319 | 275 | 578 | 591
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 | 886 | 747 | 1,673 | 1,504
Operating segments | CenterWell | Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 335 | 341 | 670 | 655
Operating segments | CenterWell | Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 322 | 190 | 563 | 391
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 | Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 229 | 216 | 440 | 458
Operating segments | CenterWell | Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 886 | 747 | 1,673 | 1,504
Eliminations/ Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (3,932) | (3,658) | (7,838) | (7,324)
Investment income | 130 | 140 | 256 | 236
Benefits | (143) | (118) | (270) | (253)
Operating costs | (3,800) | (3,627) | (7,605) | (7,192)
Depreciation and amortization | (29) | (31) | (59) | (59)
Total operating expenses | (3,972) | (3,776) | (7,934) | (7,504)
Income from operations | 40 | 118 | 96 | 180
Interest expense | 167 | 119 | 325 | 232
Other expense (income), net | 55 | 54 | 118 | 46
Income (loss) before income taxes and equity in net losses | (182) | (55) | (347) | (98)
Equity in net earnings (losses) | 0 | 0 | 0 | 0
Segment earnings (loss) | (182) | (55) | (347) | (98)
Net loss attributable to noncontrolling interests | 0 | 0 | 0 | 0
Segment earnings (loss) attributable to Humana | (182) | (55) | (347) | (98)
Eliminations/ Corporate | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1 | 15 | 2 | 29
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 | 15 | 2 | 29
Eliminations/ Corporate | CenterWell |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 4,061 | 3,783 | 8,092 | 7,531
Eliminations/ Corporate | CenterWell | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 2,645 | 2,639 | 5,262 | 5,254
Eliminations/ Corporate | CenterWell | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,416 | 1,144 | 2,830 | 2,277
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (4,062) | (3,798) | (8,094) | (7,560)
Intersegment Eliminations | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (2,645) | (2,639) | (5,262) | (5,254)
Intersegment Eliminations | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ (1,417) | $ (1,159) | $ (2,832) | $ (2,306)

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