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SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Segment Reporting Information [Line Items] |  |  |  |
Premiums | $ 25,099 | $ 21,468 | $ 76,144 | $ 66,437
Services revenue | 1,016 | 1,159 | 2,993 | 3,772
Total revenues | 26,423 | 22,799 | 79,912 | 70,431
Investment income | 308 | 172 | 775 | 222
Benefits | 21,745 | 18,384 | 65,612 | 57,108
Operating costs | 3,271 | 3,061 | 9,361 | 9,120
Depreciation and amortization | 201 | 182 | 578 | 527
Total operating expenses | 25,217 | 21,627 | 75,551 | 66,755
Income (loss) from operations | 1,206 | 1,172 | 4,361 | 3,676
Gain on sale of Gentiva Hospice | 0 | (240) | 0 | (240)
Interest expense | 114 | 102 | 347 | 293
Other expense (income), net | (6) | 13 | 40 | (16)
Income (loss) before income taxes and equity in net losses | 1,098 | 1,297 | 3,974 | 3,639
Equity in net earnings (losses) | (12) | 3 | (39) | 1
Segment earnings (loss) | 1,086 | 1,300 | 3,935 | 3,640
Net loss (income) attributable to noncontrolling interests | 2 | 2 | 6 | 1
Segment earnings (loss) attributable to Humana | 1,088 | 1,302 | 3,941 | 3,641
Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 25,099 | 21,468 | 76,144 | 66,437
Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 21,825 | 18,333 | 66,064 | 57,054
Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 19,637 | 16,007 | 59,195 | 49,751
Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,695 | 1,792 | 5,192 | 5,524
Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 493 | 534 | 1,677 | 1,779
Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 842 | 1,075 | 2,810 | 3,324
Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 252 | 262 | 758 | 784
Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 185 | 188 | 546 | 555
Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,995 | 1,610 | 5,966 | 4,720
Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 1,016 | 1,159 | 2,993 | 3,772
Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 342 | 519 | 997 | 1,997
Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 214 | 159 | 605 | 409
Services | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 55 | 73 | 190 | 225
Services | Military and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 202 | 137 | 540 | 395
Services | Pharmacy solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 203 | 271 | 661 | 746
Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 26,115 | 22,627 | 79,137 | 70,209
Operating segments | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 25,511 | 21,743 | 77,289 | 67,242
Investment income | 154 | 51 | 385 | 143
Benefits | 21,976 | 18,413 | 66,096 | 57,311
Operating costs | 2,634 | 2,294 | 7,597 | 6,486
Depreciation and amortization | 179 | 163 | 516 | 469
Total operating expenses | 24,789 | 20,870 | 74,209 | 64,266
Income (loss) from operations | 722 | 873 | 3,080 | 2,976
Gain on sale of Gentiva Hospice |  | 0 |  | 0
Interest expense | 0 | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0 | 0
Income (loss) before income taxes and equity in net losses | 722 | 873 | 3,080 | 2,976
Equity in net earnings (losses) | 0 | 8 | (2) | 16
Segment earnings (loss) | 722 | 881 | 3,078 | 2,992
Net loss (income) attributable to noncontrolling interests | 3 | 2 | 7 | 2
Segment earnings (loss) attributable to Humana | 725 | 883 | 3,085 | 2,994
Operating segments | Insurance | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 25,099 | 21,468 | 76,144 | 66,437
Operating segments | Insurance | Products | Total Medicare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 21,825 | 18,333 | 66,064 | 57,054
Operating segments | Insurance | Products | Individual Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 19,637 | 16,007 | 59,195 | 49,751
Operating segments | Insurance | Products | Group Medicare Advantage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,695 | 1,792 | 5,192 | 5,524
Operating segments | Insurance | Products | Medicare stand-alone PDP |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 493 | 534 | 1,677 | 1,779
Operating segments | Insurance | Products | Commercial fully-insured |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 842 | 1,075 | 2,810 | 3,324
Operating segments | Insurance | Products | Specialty benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 252 | 262 | 758 | 784
Operating segments | Insurance | Products | Medicare Supplement |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 185 | 188 | 546 | 555
Operating segments | Insurance | Products | State-based contracts and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Premiums | 1,995 | 1,610 | 5,966 | 4,720
Operating segments | Insurance | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 257 | 210 | 730 | 620
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 | 55 | 73 | 190 | 225
Operating segments | Insurance | Services | Military and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 202 | 137 | 540 | 395
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 | 25,356 | 21,678 | 76,874 | 67,057
Operating segments | CenterWell |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 4,660 | 4,274 | 13,695 | 13,166
Investment income | 0 | 3 | 0 | 6
Benefits | 0 | 0 | 0 | 0
Operating costs | 4,207 | 3,929 | 12,526 | 12,002
Depreciation and amortization | 53 | 45 | 152 | 136
Total operating expenses | 4,260 | 3,974 | 12,678 | 12,138
Income (loss) from operations | 400 | 300 | 1,017 | 1,028
Gain on sale of Gentiva Hospice |  | (240) |  | (240)
Interest expense | 1 | 0 | 2 | 0
Other expense (income), net | 0 | 0 | 0 | 0
Income (loss) before income taxes and equity in net losses | 399 | 540 | 1,015 | 1,268
Equity in net earnings (losses) | (12) | (5) | (37) | (15)
Segment earnings (loss) | 387 | 535 | 978 | 1,253
Net loss (income) attributable to noncontrolling interests | (1) | 0 | (1) | (1)
Segment earnings (loss) attributable to Humana | 386 | 535 | 977 | 1,252
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 | 759 | 949 | 2,263 | 3,152
Operating segments | CenterWell | Services | Home solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 342 | 519 | 997 | 1,997
Operating segments | CenterWell | Services | Primary care |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 214 | 159 | 605 | 409
Operating segments | CenterWell | Services | Commercial ASO |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Services revenue | 0 | 0 | 0 | 0
Operating segments | CenterWell | Services | Military 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 | 203 | 271 | 661 | 746
Operating segments | CenterWell | Total external revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 759 | 949 | 2,263 | 3,152
Eliminations/ Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (3,748) | (3,218) | (11,072) | (9,977)
Investment income | 154 | 118 | 390 | 73
Benefits | (231) | (29) | (484) | (203)
Operating costs | (3,570) | (3,162) | (10,762) | (9,368)
Depreciation and amortization | (31) | (26) | (90) | (78)
Total operating expenses | (3,832) | (3,217) | (11,336) | (9,649)
Income (loss) from operations | 84 | (1) | 264 | (328)
Gain on sale of Gentiva Hospice |  | 0 |  | 0
Interest expense | 113 | 102 | 345 | 293
Other expense (income), net | (6) | 13 | 40 | (16)
Income (loss) before income taxes and equity in net losses | (23) | (116) | (121) | (605)
Equity in net earnings (losses) | 0 | 0 | 0 | 0
Segment earnings (loss) | (23) | (116) | (121) | (605)
Net loss (income) attributable to noncontrolling interests | 0 | 0 | 0 | 0
Segment earnings (loss) attributable to Humana | (23) | (116) | (121) | (605)
Eliminations/ Corporate | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1 | 14 | 30 | 42
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 | 14 | 30 | 42
Eliminations/ Corporate | CenterWell |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 3,901 | 3,322 | 11,432 | 10,008
Eliminations/ Corporate | CenterWell | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 2,594 | 2,459 | 7,848 | 7,394
Eliminations/ Corporate | CenterWell | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,307 | 863 | 3,584 | 2,614
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (3,902) | (3,336) | (11,462) | (10,050)
Intersegment Eliminations | Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (2,594) | (2,459) | (7,848) | (7,394)
Intersegment Eliminations | Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ (1,308) | $ (877) | $ (3,614) | $ (2,656)

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