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Collaboration Agreements and Research and Development Funding Arrangement (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Mar. 31, 2024 | Oct. 31, 2022
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |
Research and development | $ 1,221 | $ 1,148 | $ 2,284 | $ 2,279 |  |
Merck | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |
Cash proceeds |  |  |  |  |  | $ 250
Research and development | 95 | 50 | 171 | 69 |  |
Recovery of costs | $ 33 | $ 12 | $ 57 | $ 18 |  |
Blackstone Life Sciences (Blackstone) | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |
Funding amount |  |  |  |  | $ 750 |
Milestone payments |  |  |  |  | $ 750 |

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- Definition Collaborative Arrangement, Funding Amount + References No definition available. + Details
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- Definition Collaborative Arrangement, Rights and Obligations, Maximum Aggregate Milestone Payments, Per Product + References No definition available. + Details
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 730 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482916/730-10-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 912 -SubTopic 730 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479532/912-730-25-1 + Details
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