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Business Combinations (Details) - USD ($) $ in Millions |  |  |  | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2022 | Jan. 01, 2022 | Oct. 25, 2021 | Sep. 30, 2022
AgeWell |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Total purchase price | $ 134 |  |  |
Cigna Corporation's Texas Medicaid and Medicare-Medicaid Plan |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Total purchase price |  | $ 60 |  |
Goodwill |  | 24 |  |
Cigna Corporation's Texas Medicaid and Medicare-Medicaid Plan | Member list |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Acquired membership with a preliminary fair value |  | $ 36 |  |
Affinity Health Plan, Inc |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Total purchase price |  |  | $ 176 |
Goodwill |  |  |  | $ 7
Medical claims and benefits payable |  |  |  | 8
Increase to receivables, net of amounts due government agencies |  |  |  | $ 1

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