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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Receipts (Payments) from Contract Deposits, Net (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accounting Policies [Abstract] |  |  |
Part D subsidy/discount payments | $ (17,762) | $ (17,582) | $ (16,530)
Part D subsidy/discount reimbursements | 15,921 | 18,353 | 18,498
Net (payments) reimbursements | $ (1,841) | $ 771 | $ 1,968

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- Definition Subsidy And Discount Reimbursements + References No definition available. + Details
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