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Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Recognized loss | $ 4 | $ 24 |
Contingent consideration liabilities | 8 | 47 |
Contingent consideration liabilities settled | 20 | 20 | $ 0
Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Contingent consideration liabilities | 8 | $ 47 |
Passport Health Plan Inc |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Contingent consideration paid to seller included in financing and operating activities | 43 |  |
Passport Health Plan Inc | Minimum Member Enrollment Targets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Remaining half of contingent consideration paid | 23 |  |
Passport Health Plan Inc | Operating Income Guarantee |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Contingent consideration liabilities settled | $ 20 |  |

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