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Medical Costs Payable (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |
Medical costs payable, beginning of period | $ 34,224 | $ 32,395
Acquisitions (dispositions), net | 0 | (687)
Reported medical costs: |  |
Current year | 152,316 | 131,583
Prior year | (320) | (390)
Total reported medical costs | 151,996 | 131,193
Medical payments: |  |
Payments for current year | (118,793) | (102,288)
Payments for prior years | (28,998) | (27,887)
Total medical payments | (147,791) | (130,175)
Less: increase in medical costs payable included within businesses held for sale | (2) | (179)
Medical costs payable, end of period | $ 38,427 | $ 32,547

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