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Medical Claims and Benefits Payable - Components of Change in Medical Claims and Benefits Payable (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | $ 4,640 | $ 4,204
Components of medical care costs related to: |  |
Current year | 19,509 | 17,301
Prior years | (201) | (519)
Total medical care costs | 19,308 | 16,782
Payments for medical care costs related to: |  |
Current year | 15,700 | 13,429
Prior years | 3,918 | 3,161
Total paid | 19,618 | 16,590
Acquired balances, net of post-acquisition adjustments | 295 | 421
Change in non-risk and other payables | 260 | (240)
Medical claims and benefits payable, ending balance | 4,885 | 4,577
Medicaid |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 3,667 | 3,444
Components of medical care costs related to: |  |
Current year | 14,833 | 13,870
Prior years | (162) | (458)
Total medical care costs | 14,671 | 13,412
Payments for medical care costs related to: |  |
Current year | 11,981 | 10,931
Prior years | 2,978 | 2,237
Total paid | 14,959 | 13,168
Acquired balances, net of post-acquisition adjustments | 0 | 0
Change in non-risk and other payables | 260 | (177)
Medical claims and benefits payable, ending balance | 3,639 | 3,511
Medicare |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 722 | 532
Components of medical care costs related to: |  |
Current year | 2,813 | 2,555
Prior years | (70) | (52)
Total medical care costs | 2,743 | 2,503
Payments for medical care costs related to: |  |
Current year | 2,203 | 1,877
Prior years | 641 | 728
Total paid | 2,844 | 2,605
Acquired balances, net of post-acquisition adjustments | 128 | 421
Change in non-risk and other payables | 0 | (63)
Medical claims and benefits payable, ending balance | 749 | 788
Marketplace |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 251 | 228
Components of medical care costs related to: |  |
Current year | 1,815 | 876
Prior years | 31 | (9)
Total medical care costs | 1,846 | 867
Payments for medical care costs related to: |  |
Current year | 1,465 | 621
Prior years | 284 | 196
Total paid | 1,749 | 817
Acquired balances, net of post-acquisition adjustments | 125 | 0
Change in non-risk and other payables | 0 | 0
Medical claims and benefits payable, ending balance | 473 | 278
Other |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 0 | 0
Components of medical care costs related to: |  |
Current year | 48 | 0
Prior years | 0 | 0
Total medical care costs | 48 | 0
Payments for medical care costs related to: |  |
Current year | 51 | 0
Prior years | 15 | 0
Total paid | 66 | 0
Acquired balances, net of post-acquisition adjustments | 42 | 0
Change in non-risk and other payables | 0 | 0
Medical claims and benefits payable, ending balance | $ 24 | $ 0

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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-11 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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