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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, 2024 | Jun. 30, 2023
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | $ 4,204 | $ 3,528
Components of medical care costs related to: |  |
Current year | 17,301 | 14,180
Prior years | (519) | (271)
Total medical care costs | 16,782 | 13,909
Payments for medical care costs related to: |  |
Current year | 13,429 | 11,166
Prior years | 3,161 | 2,650
Total paid | 16,590 | 13,816
Acquired balances, net of post-acquisition adjustments | 421 | 0
Change in non-risk and other payables | (240) | 56
Medical claims and benefits payable, ending balance | 4,577 | 3,677
Medicaid |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 3,444 | 2,815
Components of medical care costs related to: |  |
Current year | 13,870 | 11,585
Prior years | (458) | (241)
Total medical care costs | 13,412 | 11,344
Payments for medical care costs related to: |  |
Current year | 10,931 | 9,184
Prior years | 2,237 | 2,041
Total paid | 13,168 | 11,225
Acquired balances, net of post-acquisition adjustments | 0 | 0
Change in non-risk and other payables | (177) | 58
Medical claims and benefits payable, ending balance | 3,511 | 2,992
Medicare |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 532 | 452
Components of medical care costs related to: |  |
Current year | 2,555 | 1,857
Prior years | (52) | (6)
Total medical care costs | 2,503 | 1,851
Payments for medical care costs related to: |  |
Current year | 1,877 | 1,430
Prior years | 728 | 406
Total paid | 2,605 | 1,836
Acquired balances, net of post-acquisition adjustments | 421 | 0
Change in non-risk and other payables | (63) | (2)
Medical claims and benefits payable, ending balance | 788 | 465
Marketplace |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 228 | 261
Components of medical care costs related to: |  |
Current year | 876 | 738
Prior years | (9) | (24)
Total medical care costs | 867 | 714
Payments for medical care costs related to: |  |
Current year | 621 | 552
Prior years | 196 | 203
Total paid | 817 | 755
Acquired balances, net of post-acquisition adjustments | 0 | 0
Change in non-risk and other payables | 0 | 0
Medical claims and benefits payable, ending balance | $ 278 | $ 220

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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 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: 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 3: 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 4: 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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