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Medical Claims and Benefits Payable - Components of Change in Medical Claims and Benefits Payable (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | $ 3,363 | $ 2,696
Components of medical care costs related to: |  |
Current year | 6,769 | 5,668
Prior years | (206) | (194)
Total medical care costs | 6,563 | 5,474
Payments for medical care costs related to: |  |
Current year | 4,197 | 3,513
Prior years | 2,199 | 1,781
Total paid | 6,396 | 5,294
Acquired balances, net of post-acquisition adjustments | (25) | (25)
Change in non-risk and other provider payables | 96 | (12)
Medical claims and benefits payable, ending balance | 3,601 | 2,839
Medicaid |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 2,580 | 2,129
Components of medical care costs related to: |  |
Current year | 5,424 | 4,394
Prior years | (154) | (158)
Total medical care costs | 5,270 | 4,236
Payments for medical care costs related to: |  |
Current year | 3,402 | 2,790
Prior years | 1,633 | 1,364
Total paid | 5,035 | 4,154
Acquired balances, net of post-acquisition adjustments | (25) | 8
Change in non-risk and other provider payables | 93 | (11)
Medical claims and benefits payable, ending balance | 2,883 | 2,208
Medicare |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 404 | 392
Components of medical care costs related to: |  |
Current year | 840 | 738
Prior years | (25) | (16)
Total medical care costs | 815 | 722
Payments for medical care costs related to: |  |
Current year | 465 | 410
Prior years | 306 | 304
Total paid | 771 | 714
Acquired balances, net of post-acquisition adjustments | 0 | (33)
Change in non-risk and other provider payables | 3 | (1)
Medical claims and benefits payable, ending balance | 451 | 366
Marketplace |  |
Insurance Claims |  |
Medical claims and benefits payable, beginning balance | 379 | 175
Components of medical care costs related to: |  |
Current year | 505 | 536
Prior years | (27) | (20)
Total medical care costs | 478 | 516
Payments for medical care costs related to: |  |
Current year | 330 | 313
Prior years | 260 | 113
Total paid | 590 | 426
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 | $ 267 | $ 265

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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 http://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 http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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