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Medical Costs Payable (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Medical costs payable, beginning of period | $ 29,056 | $ 24,483
Acquisitions | 1 | 171
Reported medical costs: |  |
Current year | 120,773 | 104,936
Prior year | (660) | (320)
Total reported medical costs | 120,113 | 104,616
Medical payments: |  |
Payments for current year | (91,621) | (78,937)
Payments for prior years | (25,602) | (21,355)
Total medical payments | (117,223) | (100,292)
Medical costs payable, end of period | $ 31,947 | $ 28,978

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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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