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Collaboration, License, and Other Agreements - Sanofi, Immuno-Oncology Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Up-front payment to be made to collaborator | $ 3,162.1 | $ 2,965.1 |
Sanofi |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Up-front payment to collaborating party |  |  | $ 900.0
Sanofi Collaboration Agreement, Immuno-oncology |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Royalty payment to collaborating party, percentage of net product sales | 11.00% |  |
Sanofi Collaboration Agreement, Immuno-oncology | Regulatory Milestone | Sanofi |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Up-front payment to collaborating party |  |  | 100.0
Sanofi Collaboration Agreement, Immuno-oncology | Sales-Based Milestone One | Sanofi |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Up-front payment to be made to collaborator |  |  | $ 65.0
Sanofi Collaboration Agreement, Immuno-oncology | Sales-Based Milestone Two | Sanofi |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Up-front payment to be made to collaborator | $ 35.0 |  |
Sanofi Collaboration Agreement, Immuno-oncology | Sales-Based Milestones | Sanofi |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Up-front payment to be made to collaborator | $ 100.0 |  |

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