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SEGMENT INFORMATION - Segment Results (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Premiums | $ 87,712 | $ 79,822 | $ 74,186
Services revenue | 4,776 | 3,055 | 1,815
Total revenues | 92,870 | 83,064 | 77,155
Investment income | 382 | 187 | 1,154
Benefits | 75,690 | 69,199 | 61,628
Operating costs | 12,671 | 10,121 | 10,052
Depreciation and amortization | 709 | 596 | 489
Total operating expenses | 89,070 | 79,916 | 72,169
Income from operations | 3,800 | 3,148 | 4,986
Gain on sale of KAH Hospice | (237) | 0 | 0
Interest expense | 401 | 326 | 283
Other expense (income), net | 68 | (532) | 103
Income before income taxes and equity in net (losses) earnings | 3,568 | 3,354 | 4,600
Equity in net (losses) earnings | (4) | 65 | 74
Segment earnings | 3,564 | 3,419 | 4,674
Net (income) loss attributable to noncontrolling interests | 4 | (1) |
Segment earnings (loss) attributable to Humana | 3,568 | 3,418 |
Individual Medicare Advantage |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 65,591 | 58,654 | 51,697
Group Medicare Advantage |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 7,297 | 6,955 | 7,774
Medicare stand-alone PDP |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 2,269 | 2,371 | 2,742
Total Medicare |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 75,157 | 67,980 | 62,213
Fully-insured |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 4,476 | 5,002 | 6,051
Specialty |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 1,703 | 1,731 | 1,699
Medicaid and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 6,376 | 5,109 | 4,223
Home solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 2,333 | 1,166 | 107
Provider |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 568 | 413 | 328
ASO and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 850 | 853 | 813
Pharmacy |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 1,025 | 623 | 567
Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 88,841 | 80,930 | 74,597
Investment income | 223 | 214 | 171
Total operating expenses | 85,819 | 78,518 | 71,477
CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 17,307 | 14,058 | 11,490
Investment income | 8 | 4 | 13
Total operating expenses | 16,016 | 13,120 | 10,866
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 92,488 | 82,877 | 76,001
Operating Segments | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 87,712 | 79,822 | 73,584
Services revenue | 850 | 853 | 813
Total revenues | 88,562 | 80,675 | 74,397
Benefits | 75,934 | 69,639 | 61,909
Operating costs | 9,251 | 8,340 | 9,129
Depreciation and amortization | 634 | 539 | 439
Income from operations | 3,022 | 2,412 | 3,120
Gain on sale of KAH Hospice | 0 |  |
Interest expense | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0
Income before income taxes and equity in net (losses) earnings | 3,022 | 2,412 | 3,120
Equity in net (losses) earnings | 18 | 0 | 0
Segment earnings | 3,040 | 2,412 | 3,120
Net (income) loss attributable to noncontrolling interests | 5 | 0 |
Segment earnings (loss) attributable to Humana | 3,045 | 2,412 |
Operating Segments | Insurance | Individual Medicare Advantage |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 65,591 | 58,654 | 51,697
Operating Segments | Insurance | Group Medicare Advantage |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 7,297 | 6,955 | 7,774
Operating Segments | Insurance | Medicare stand-alone PDP |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 2,269 | 2,371 | 2,742
Operating Segments | Insurance | Total Medicare |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 75,157 | 67,980 | 62,213
Operating Segments | Insurance | Fully-insured |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 4,476 | 5,002 | 5,449
Operating Segments | Insurance | Specialty |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 1,703 | 1,731 | 1,699
Operating Segments | Insurance | Medicaid and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 6,376 | 5,109 | 4,223
Operating Segments | Insurance | Home solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 0 | 0 | 0
Operating Segments | Insurance | Provider |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 0 | 0 | 0
Operating Segments | Insurance | ASO and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 850 | 853 | 813
Operating Segments | Insurance | Pharmacy |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 0 | 0 | 0
Operating Segments | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Services revenue | 3,926 | 2,202 | 1,002
Total revenues | 3,926 | 2,202 | 1,002
Benefits | 0 | 0 | 0
Operating costs | 15,835 | 12,968 | 10,706
Depreciation and amortization | 181 | 152 | 160
Income from operations | 1,291 | 938 | 624
Gain on sale of KAH Hospice | (237) |  |
Interest expense | 0 | 0 | 0
Other expense (income), net | 0 | 0 | 0
Income before income taxes and equity in net (losses) earnings | 1,528 | 938 | 624
Equity in net (losses) earnings | (22) | 65 | 74
Segment earnings | 1,506 | 1,003 | 698
Net (income) loss attributable to noncontrolling interests | (1) | (1) |
Segment earnings (loss) attributable to Humana | 1,505 | 1,002 |
Operating Segments | CenterWell | Individual Medicare Advantage |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Group Medicare Advantage |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Medicare stand-alone PDP |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Total Medicare |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Fully-insured |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Specialty |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Medicaid and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums | 0 | 0 | 0
Operating Segments | CenterWell | Home solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 2,333 | 1,166 | 107
Operating Segments | CenterWell | Provider |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 568 | 413 | 328
Operating Segments | CenterWell | ASO and other |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 0 | 0 | 0
Operating Segments | CenterWell | Pharmacy |  |  |
Segment Reporting Information [Line Items] |  |  |
Services revenue | 1,025 | 623 | 567
Eliminations/ Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums |  |  | 602
Total revenues | (13,278) | (11,924) | (8,932)
Investment income | 151 | (31) | 970
Benefits | (244) | (440) | (281)
Operating costs | (12,415) | (11,187) | (9,783)
Depreciation and amortization | (106) | (95) | (110)
Total operating expenses | (12,765) | (11,722) | (10,174)
Income from operations | (513) | (202) | 1,242
Gain on sale of KAH Hospice | 0 |  |
Interest expense | 401 | 326 | 283
Other expense (income), net | 68 | (532) | 103
Income before income taxes and equity in net (losses) earnings | (982) | 4 | 856
Equity in net (losses) earnings | 0 | 0 | 0
Segment earnings | (982) | 4 | 856
Net (income) loss attributable to noncontrolling interests | 0 | 0 |
Segment earnings (loss) attributable to Humana | (982) | 4 |
Eliminations/ Corporate | Fully-insured |  |  |
Segment Reporting Information [Line Items] |  |  |
Premiums |  |  | 602
Total revenues |  |  | 602
Eliminations/ Corporate | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 56 | 41 | 29
Eliminations/ Corporate | Insurance | Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 56 | 41 | 29
Eliminations/ Corporate | Insurance | Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Eliminations/ Corporate | CenterWell |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 13,373 | 11,852 | 10,475
Eliminations/ Corporate | CenterWell | Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 3,532 | 2,828 | 2,547
Eliminations/ Corporate | CenterWell | Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 9,841 | 9,024 | 7,928
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | (13,429) | (11,893) | (10,504)
Intersegment Eliminations | Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | (3,588) | (2,869) | (2,576)
Intersegment Eliminations | Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ (9,841) | $ (9,024) | $ (7,928)

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