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Business Combinations - Narrative (Details) - Bright Health Medicare - USD ($) $ in Millions | Jan. 01, 2024 | Jun. 30, 2024
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Business Acquisition, Contingent Consideration [Line Items] |  |
Cash paid for acquisition | $ 441 |
Acquisition costs |  | $ 3
Contingent consideration liabilities | 100 |
Consideration transferred | 86 |
Third-party escrow | 100 |
Acquired receivable, fair value | $ 14 | 2
Fair value of contingent consideration |  | $ 98

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