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Collaborations and Other Arrangements - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 31, 2023 | Jun. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Proceeds from sale of product rights |  |  |  | $ 530.9 | $ 1,604.3
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Olanzapine Portfolio |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Proceeds from sale of product rights | $ 1,050.0 |  |  |  |
Additional cash proceeds | $ 305.0 |  |  |  |
Revenue recognized |  |  | $ 1,420.0 |  | 1,420.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Baqsimi |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Proceeds from sale of product rights |  | $ 500.0 |  |  |
Additional cash proceeds |  | $ 125.0 |  |  |
Milestone payment received |  |  |  | $ 450.0 |
Revenue recognized |  |  |  |  | $ 579.0
Royalty Agreement Terms | Olumiant® |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Collaborative arrangement, rights and obligations percent (up to) |  |  |  | 20.00% |
Milestone Payments, Sales-based | Olumiant® |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Potential achievements |  |  |  | $ 100.0 |
Milestone Payments, Sales-based | Ebglyss |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Potential achievements |  |  |  | 1,250.0 |
Milestone Payments, Sales-based | Ebglyss | Roche |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Potential achievements |  |  |  | 1,030.0 |
Milestone Payments, Sales-based | Orforglipron | Chugai |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Potential achievements |  |  |  | 250.0 |
Milestone Payments, Development and Regulatory | Orforglipron | Chugai |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |
Potential achievements |  |  |  | $ 140.0 |

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