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Medical Costs Payable (Narrative) (Details) - USD ($) $ in Billions | Jun. 30, 2025 | Dec. 31, 2024
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Insurance [Abstract] |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount | $ 26.8 | $ 23.7

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- References No definition available. + Details
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- Definition Estimated costs as of the balance sheet date of settling insured claims and costs incurred in the claims settlement process for claims that have not yet been submitted to the insurance company for reimbursement. + References No definition available. + Details
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