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SEGMENT INFORMATION
 3 Months Ended
Mar. 31, 2024
Segment Reporting [Abstract]  
SEGMENT INFORMATION SEGMENT INFORMATION
Our two reportable segments, Insurance and CenterWell, are based on a combination of the type of health plan customer and adjacent businesses centered on well-being solutions for our health plans and other customers, as described below. These segment groupings are consistent with information used by our Chief Executive Officer, the Chief Operating Decision Maker, to assess performance and allocate resources.
The Insurance segment consists of Medicare benefits, marketed to individuals or directly via group Medicare accounts, as well as our contract with CMS to administer the Limited Income Newly Eligible Transition, or LI-NET, prescription drug plan program and contracts with various states to provide Medicaid, dual eligible demonstration,
and Long-Term Support Services benefits, which we refer to collectively as our state-based contracts. This segment also includes products consisting of employer group commercial fully-insured medical and specialty health insurance benefits marketed to individuals and employer groups, including dental, vision, and other supplemental health benefits, as well as administrative services only, or ASO. In addition, our Insurance segment includes our Military services business, primarily our T-2017 East Region contract, as well as the operations of our PBM business.
The CenterWell segment includes our pharmacy, primary care, and home solutions operations. The segment also includes our strategic partnerships with WCAS to develop and operate senior-focused, payor-agnostic, primary care centers, as well as our minority ownership interest in hospice operations. Services offered by this segment are designed to enhance the overall healthcare experience. These services may lead to lower utilization associated with improved member health and/or lower drug costs.
Our CenterWell intersegment revenues primarily relate to the operations of CenterWell Pharmacy (our mail- order pharmacy business), CenterWell Specialty Pharmacy, and retail pharmacies jointly located within CenterWell Senior Primary Care clinics.
In addition, our CenterWell intersegment revenues include revenues earned by certain owned providers derived from certain value-based arrangements with our health plans. Under these value-based arrangements, our owned providers enter into agreements with our health plans to stand ready to deliver, integrate, direct and control the administration and management of certain health care services for our members. In exchange, the owned provider receives a premium that is typically paid on a per-member per-month basis. These value-based arrangements represent a single performance obligation where revenues are recognized in the period in which we are obligated to provide integrated health care services to our members. Fee-for-service revenue is recognized at agreed upon rates, net of contractual allowances, as the performance obligation is completed on the date of service.
We present our condensed consolidated results of operations from the perspective of the health plans. As a result, the cost of providing benefits to our members, whether provided via a third party provider or internally through a stand-alone subsidiary, is classified as benefits expense and excludes the portion of the cost for which the health plans do not bear responsibility, including member co-share amounts and government subsidies of $3.7 billion and $4.0 billion for the three months ended March 31, 2024 and 2023, respectively. In addition, depreciation and amortization expense associated with certain businesses delivering benefits to our members, primarily associated with our primary care and pharmacy operations, are included with benefits expense. The amount of this expense was $32 million and $33 million for the three months ended March 31, 2024 and 2023, respectively.
Other than those described previously, the accounting policies of each segment are the same. For additional information regarding our accounting policies refer to Note 2 to the audited Consolidated Financial Statements included in Part II, Item 8, "Financial Statements and Supplementary Data" in our 2023 Form 10-K. Transactions between reportable segments primarily consist of sales of products and services rendered by our CenterWell segment, primarily pharmacy, primary care, and home services, to our Insurance segment customers. Intersegment sales and expenses are recorded primarily at fair value and eliminated in consolidation. Members served by our segments often use the same provider networks, enabling us in some instances to obtain more favorable contract terms with providers. Our segments also share indirect costs and assets. As a result, the profitability of each segment is interdependent. We allocate most operating expenses to our segments. Assets and certain corporate income and expenses are not allocated to the segments, including the portion of investment income not supporting segment operations, interest expense on corporate debt, and certain other corporate expenses. These items are managed at a corporate level. These corporate amounts are reported separately from our reportable segments and are included with intersegment eliminations in the tables presenting segment results below.
Our segment results were as follows for the three months ended March 31, 2024 and 2023:
InsuranceCenterWellEliminations/
Corporate		Consolidated
Three months ended March 31, 2024(in millions)
External revenues
Premiums:
Individual Medicare Advantage$22,448 $— $— $22,448 
Group Medicare Advantage1,989 — — 1,989 
Medicare stand-alone PDP821 — — 821 
Total Medicare25,258 — — 25,258 
Commercial fully-insured256 — — 256 
Specialty benefits239 — — 239 
Medicare Supplement197 — — 197 
State-based contracts and other2,311 — — 2,311 
Total premiums28,261 — — 28,261 
Services revenue:
Home solutions— 335 — 335 
Primary care— 241 — 241 
Commercial ASO24 — — 24 
Military services and other251 — — 251 
Pharmacy solutions— 211 — 211 
Total services revenue275 787 — 1,062 
Total external revenues 28,536 787 — 29,323 
Intersegment revenues
Services1 1,414 (1,415)— 
Products— 2,617 (2,617)— 
Total intersegment revenues1 4,031 (4,032)— 
Investment income162 — 126 288 
Total revenues28,699 4,818 (3,906)29,611 
Operating expenses:
Benefits25,251 — (127)25,124 
Operating costs2,364 4,483 (3,805)3,042 
Depreciation and amortization186 53 (30)209 
Total operating expenses27,801 4,536 (3,962)28,375 
Income from operations898 282 56 1,236 
Interest expense— 1 158 159 
Other expense, net— — 63 63 
Income (loss) before income taxes and equity in net earnings 898 281 (165)1,014 
Equity in net losses(2)(22)— (24)
Segment earnings (loss)$896 $259 $(165)$990 
Net loss attributable to noncontrolling interests2 — — 2 
Segment earnings (loss) attributable to Humana$898 $259 $(165)$992 
InsuranceCenterWellEliminations/
Corporate		Consolidated
Three months ended March 31, 2023(in millions)
External revenues
Premiums:
Individual Medicare Advantage$19,809 $— $— $19,809 
Group Medicare Advantage1,765 — — 1,765 
Medicare stand-alone PDP616 — — 616 
Total Medicare22,190 — — 22,190 
Commercial fully-insured1,018 — — 1,018 
Specialty benefits254 — — 254 
Medicare Supplement179 — — 179 
State-based contracts and other1,909 — — 1,909 
Total premiums25,550 — — 25,550 
Services revenue:
Home solutions— 314 — 314 
Primary care— 201 — 201 
Commercial ASO71 — — 71 
Military services and other171 — — 171 
Pharmacy solutions— 242 — 242 
Total services revenue242 757 — 999 
Total external revenues 25,792 757 — 26,549 
Intersegment revenues
Services14 1,133 (1,147)— 
Products— 2,615 (2,615)— 
Total intersegment revenues14 3,748 (3,762)— 
Investment income 97 — 96 193 
Total revenues25,903 4,505 (3,666)26,742 
Operating expenses:
Benefits21,993 — (135)21,858 
Operating costs2,418 4,126 (3,565)2,979 
Depreciation and amortization165 49 (28)186 
Total operating expenses24,576 4,175 (3,728)25,023 
Income from operations1,327 330 62 1,719 
Interest expense— — 113 113 
Other income, net— — (8)(8)
Income (loss) before income taxes and equity in net earnings 1,327 330 (43)1,614 
Equity in net losses(3)(14)— (17)
Segment earnings (loss)$1,324 $316 $(43)$1,597 
Net loss attributable to noncontrolling interests1 — — 1 
Segment earnings (loss) attributable to Humana$1,325 $316 $(43)$1,598