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Business Combinations - Schedule of The Provisional Fair Values Assigned To Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Jan. 01, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Assets acquired: |  |  |  |
Goodwill | $ 1,671 |  | $ 1,241 | $ 1,115
Bright Health Medicare |  |  |  |
Assets acquired: |  |  |  |
Current assets |  | $ 335 |  |
Goodwill |  | 430 |  |
Intangible assets |  | 141 |  |
Other long-term assets |  | 53 |  |
Liabilities assumed: |  |  |  |
Medical claims and benefits payable |  | (476) |  |
Amounts due government agencies |  | (33) |  |
Accounts payable, accrued and other long-term liabilities |  | (23) |  |
Fair value of net assets acquired |  | $ 427 |  |

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