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Commitment and Contingencies (Details) dose in Millions |  |  | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 16, 2024 USD ($) | Dec. 12, 2022 defendant | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) installment | Aug. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Nov. 18, 2022 dose | Sep. 30, 2022 USD ($) payment installment | Oct. 22, 2020 dose
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of defendants | defendant |  | 2 |  |  |  |  |  |  |
Period to answer |  | 14 days |  |  |  |  |  |  |
Purchase agreement, number of vaccine doses | dose |  |  |  |  |  |  |  |  | 60
Purchase obligation |  |  |  | $ 0 |  |  |  |  |
Gavi Advance Purchase Agreement- COVAX Facility |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of doses to be distributed | dose |  |  |  |  |  |  | 350 |  |
Purchase agreement, number of vaccine doses | dose |  |  |  |  |  |  | 2 |  |
Remaining payment amount |  |  |  |  |  | $ 696,400,000 |  |  |
Settlement Agreement |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Settlement payment |  |  |  |  | $ 149,800,000 |  |  | $ 185,000,000 |
Number of quarterly installment payments | installment |  |  |  | 2 |  |  |  | 4 |
Number of settlement payments | payment |  |  |  |  |  |  |  | 2 |
Settlement agreement, quarterly installment amount |  |  |  | $ 34,300,000 |  |  |  |  |
Settlement Agreement | Subsequent Event |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Initial settlement payment | $ 75,000,000 |  |  |  |  |  |  |  |
Settlement expense | 80,000,000 |  |  |  |  |  |  |  |
Grants additional credit | $ 225,000,000 |  |  |  |  |  |  |  |
Settlement Agreement | Forecast |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Settlement expense |  |  | $ 400,000,000 |  |  |  |  |  |
Settlement Agreement | Accrued Liabilities |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Settlement payment |  |  |  | $ 68,600,000 |  |  |  |  |

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