Acquisitions - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Feb. 28, 2019	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill		$ 140,627,000	$ 140,627,000
Estimated fair value of contingent consideration, short term liabilities			55,345,000
Estimated fair value of contingent consideration, long-term liabilities		109,606,000	95,034,000
Change in the estimated fair value of contingent consideration		(40,773,000)	(3,364,000)	$ 31,842,000
Cobalt Biomedicine, Inc | Acquisition Agreement
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired	100.00%
Business acquisition, impairment of intangible assets or goodwill	$ 0
Goodwill	140,600,000	140,600,000
Maximum contingent consideration upon achievement of certain pre-specified development milestones	$ 500,000,000
Maximum term for success payment	20 years
Cobalt Biomedicine, Inc | Acquisition Agreement | Research and Development Expense
Business Acquisition [Line Items]
Estimated fair value of contingent consideration		109,600,000	150,400,000
Estimated fair value of contingent consideration, short term liabilities			55,400,000
Estimated fair value of contingent consideration, long-term liabilities			95,000,000
Change in estimated fair value of success payment		(7,900,000)	(69,300,000)	23,600,000
Change in the estimated fair value of contingent consideration		(40,800,000)	(3,400,000)	$ 31,800,000
Cobalt Biomedicine, Inc | Acquisition Agreement | Long-term Liabilities | Research and Development Expense
Business Acquisition [Line Items]
Estimated fair value of success payment liability		$ 11,200,000	$ 19,000,000
Cobalt Biomedicine, Inc | Acquisition Agreement | Minimum
Business Acquisition [Line Items]
Threshold market capitalization	$ 8,100,000,000
Cobalt Biomedicine, Inc | Acquisition Agreement | Market Capitalization Equal to or Exceeds $8.1 billion
Business Acquisition [Line Items]
Cobalt success payment	500,000,000
Cobalt Biomedicine, Inc | Acquisition Agreement | IPR&D
Business Acquisition [Line Items]
Business combination, intangible assets	$ 59,200,000