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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
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Sep. 30, 2022 | Sep. 30, 2021
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | $ 3,363 | $ 2,696
Components of medical care costs related to: |  |
Current year | 20,521 | 17,558
Prior years | (338) | (216)
Total medical care costs | 20,183 | 17,342
Payments for medical care costs related to: |  |
Current year | 17,538 | 14,880
Prior years | 2,481 | 2,008
Total paid | 20,019 | 16,888
Acquired balances, net of post-acquisition adjustments | 8 | (27)
Change in non-risk and other provider payables | 87 | 68
Medical claims and benefits payable, ending balance | 3,622 | 3,191
Medicaid |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 2,580 | 2,129
Components of medical care costs related to: |  |
Current year | 16,520 | 13,491
Prior years | (282) | (158)
Total medical care costs | 16,238 | 13,333
Payments for medical care costs related to: |  |
Current year | 14,133 | 11,530
Prior years | 1,861 | 1,538
Total paid | 15,994 | 13,068
Acquired balances, net of post-acquisition adjustments | 8 | (19)
Change in non-risk and other provider payables | 91 | 68
Medical claims and benefits payable, ending balance | 2,923 | 2,443
Medicare |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 404 | 392
Components of medical care costs related to: |  |
Current year | 2,525 | 2,195
Prior years | (38) | (36)
Total medical care costs | 2,487 | 2,159
Payments for medical care costs related to: |  |
Current year | 2,103 | 1,816
Prior years | 337 | 340
Total paid | 2,440 | 2,156
Acquired balances, net of post-acquisition adjustments | 0 | (8)
Change in non-risk and other provider payables | (4) | 0
Medical claims and benefits payable, ending balance | 447 | 387
Marketplace |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 379 | 175
Components of medical care costs related to: |  |
Current year | 1,476 | 1,872
Prior years | (18) | (22)
Total medical care costs | 1,458 | 1,850
Payments for medical care costs related to: |  |
Current year | 1,302 | 1,534
Prior years | 283 | 130
Total paid | 1,585 | 1,664
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 | $ 252 | $ 361

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI https://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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