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Medical Claims and Benefits Payable - Components of Change in Medical Claims and Benefits Payable (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | $ 3,528 | $ 3,363
Components of medical care costs related to: |  |
Current year | 21,573 | 20,521
Prior years | (358) | (338)
Total medical care costs | 21,215 | 20,183
Payments for medical care costs related to: |  |
Current year | 18,228 | 17,538
Prior years | 2,707 | 2,481
Total paid | 20,935 | 20,019
Acquired balances, net of post-acquisition adjustments | 96 | 8
Change in non-risk and other provider payables | 331 | 87
Medical claims and benefits payable, ending balance | 4,235 | 3,622
Medicaid |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 2,815 | 2,580
Components of medical care costs related to: |  |
Current year | 17,630 | 16,520
Prior years | (327) | (282)
Total medical care costs | 17,303 | 16,238
Payments for medical care costs related to: |  |
Current year | 14,961 | 14,133
Prior years | 2,074 | 1,861
Total paid | 17,035 | 15,994
Acquired balances, net of post-acquisition adjustments | 83 | 8
Change in non-risk and other provider payables | 335 | 91
Medical claims and benefits payable, ending balance | 3,501 | 2,923
Medicare |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 452 | 404
Components of medical care costs related to: |  |
Current year | 2,811 | 2,525
Prior years | (6) | (38)
Total medical care costs | 2,805 | 2,487
Payments for medical care costs related to: |  |
Current year | 2,340 | 2,103
Prior years | 424 | 337
Total paid | 2,764 | 2,440
Acquired balances, net of post-acquisition adjustments | 13 | 0
Change in non-risk and other provider payables | (4) | (4)
Medical claims and benefits payable, ending balance | 502 | 447
Marketplace |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 261 | 379
Components of medical care costs related to: |  |
Current year | 1,132 | 1,476
Prior years | (25) | (18)
Total medical care costs | 1,107 | 1,458
Payments for medical care costs related to: |  |
Current year | 927 | 1,302
Prior years | 209 | 283
Total paid | 1,136 | 1,585
Acquired balances, net of post-acquisition adjustments | 0 | 0
Change in non-risk and other provider payables | 0 | 0
Medical claims and benefits payable, ending balance | $ 232 | $ 252

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- Definition Liability for Unpaid Claims and Claims Adjustment Expense, Business Acquisitions, Net Of Post-Closing Adjustments + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-3 + Details
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